Class 8 Science students should refer to the following multiple-choice
questions with answers for All Chapters in Class 8. These MCQ questions with
answers for Class 8 Science will come in exams and help you to score good marks
All Chapters MCQ Questions Class
8 Science with Answers
Chapter 1
Crop Production and Management
The Crops which are grown in rainy
season are called
Rabi crop
Seasonal crop
Monsoon crop
Kharif crop
Rabi Crops are grown in ____
season
Summer
Spring
Winter
Rainy
Now a days seed is sown in the
field using
Seed Tractor
Seed drill
Seed Tiller
Seed Plough
Which of the following description
is true for describing ‘fertiliser’
Used in large quantity
Organic in nature
Does not cause pollution
Produced in factories
Rhizobium (a Bacteria) which fixes
atmospheric nitrogen are found in nodules growing in
Roots of leguminous plants
Leaves of leguminous plants
Stem of Leguminous plants
All of the above.
Before sowing the seeds, it is
necessary to break soil to the size of grains to get better yield. The main
tools used for such are
Tractor, Hoe, Seed drill
Bullock, tiller, tractor
Plough, Hoe, Cultivator
Plough, Seed Drill, Tractor
Growing different crops
alternately on the same land is technically called
Crop Alternation
Crop Rotation
Crop Revolution
Crop Change
Moat, Dhekli and Rahat are
different
Traditional methods of cultivation
Traditional methods of Weeding
Traditional methods of Seed sowing
Traditional methods of irrigation
In the harvested crop the grain
seed is separated from the chaff. This process id called ___
Threshing
Seeding
Ploughing
Weeding
The farm appliance ‘Combine’ is a
combined
Plough and Harvester
Seed drill cum Thresher
Harvester and Thresher
Harvester cum Sprayer
The
ideal months for harvesting khariff crop are
(a) June/July
(b) August/September
(c) September/October
(d) November/December
In
which of the following methods of irrigation rotating nozzles are used?
(a) Moat
(b) Drip system
(c) Chain Pump
(d) Sprinkler system
The
process of separating grains from chaff is known as:
(a) threshing
(b) harvesting
(c) winnowing
(d) transplantation
Which
of the following can make their own food:
(a) humans
(b) animals
(c) plants
(d) all of these
Which
of the following nutrients replenishes the soil after growing leguminous
plants?
(a) Nitrogen
(b) Oxygen
(c) Phosphorus
(d) Potassium
The
tool used for removing weeds is:
(a) plough
(c) hoe
(b) leveller
(d) none of these
Watering
the crops is called
(a) sowing
(b) manuring
(c) tilling
(d) irrigation
Pesticides
are used to destroy:
(a) pests
(b) weeds
(c) crops
(d) none of these
Which
of the following is not a fertiliser:
(a) urea
(b) cow-dung
(c) potash
(d) super phosphate
The
farm appliance ‘Combine’ is a combined
(a) Plough and Harvester
(b) Seed drill cum Thresher
(c) Harvester and Thresher
(d) Harvester cum Sprayer
The
crops which are sown in the rainy season are called:
(a) kharif crops
(b) rabi crops
(c) zayed crops
(d) none of these
Animals
like horse, donkey that carries load are called
(a) Drought species
(b) Load carrying Animals
(c) Dairy Animals
(d) Draught Animal
At
home to store grains we use:
(a) wet neem leaves
(b) dried neem leaves
(c) dried mango leaves
(d) dried peepal leaves
What
is NPK?
(a) Fertiliser
(b) Manure
(c) Weedicide
(d) Weed
Rhizobium
bacteria is present in the nodules of the roots:
(a) wheat
(b) leguminous plants
(c) maize
(d) onion
Before
sowing the seeds, it is necessary to break soil to the size of grains to get
better yield. The main tools used for such are
(a) Tractor, Hoe; Seed drill
(b) Bullock, tiller, tractor
(c) Plough, Hoe, Cultivator
(d) Plough, Seed Drill, and Tractor
Which
of the following is an important factor for the growth of crops?
(a) Temperature
(b) Flumidity
(c) Rainfall
(d) All of the above
The
supply of water to crops at different intervals is called
(a) watering
(b) irrigation
(c) harvesting
(d) none of these
The
process of loosening and turning of the soil is called:
(a) sowing
(b) tilling or ploughing
(c) leveling
(d) none of these
The
process of separating grain from chaff is called
(a) Threshing
(b) Weeding
(c) Sowing
(d) Winnowing
Chapter 2
Microorganisms: Friend or Foe
Diseases like polio and chicken pox are caused by _______
a)
Bacteria
b)
Fungi
c) Virus
d)
Worms
Examples of Multicellular Microorganism are
a)
Algae, Bacteria
b)
Bacteria and Fungi
c)
Bacteria and Viruses
d) Algae and Fungi
Some medicines obtained from micro-organisms are applied to kill
or stop the growth of disease-causing microorganisms. Such medicines are called
____.
a)
Antibodies
b) Antibiotics
c)
Antiseptics
d)
All of the above
A common preservative used in jam and pickles is
a) Sodium benzoate
b)
Nitric acid
c)
Sodium Chloride
d)
Copper Sulphate
Rhizobium found in root nodules of leguminous roots is an
a)
Atmospheric Carbon fixer
b)
Atmospheric Oxygen fixer
c) Atmospheric Nitrogen fixer
d)
All of the above
Lactobacillus is commonly found in
a)
Cake
b) Curd
c)
Bread
d)
All of the above
The process of conversion of sugar into alcohol by yeast is called
a) Fermentation
b)
Pasteurisation
c)
Alcoholism
d)
All of the above
The pores in the bread is due to gas bubbles of
a)
Oxygen
b)
Nitrogen di oxide
c)
Nitrogen
d) Carbon di oxide
Deliberately injecting weak microbes into a healthy body and
producing antibodies to fight against strong microbes is called ____
a)
Medication
b)
Antibiotics
c) Vaccination
d)
All of the above
The microbe for Malaria is carried by
a)
Male Anopheles mosquito
b) Female Anopheles Mosquito
c)
Male Aedes mosquito
d)
Female Aedes mosquito
Diseases like polio and chicken
pox are caused by _____
a) Bacteria
b) Fungi
c) Virus
d) Worms
Examples of Multicellular
Microorganism are
a) Algae, Bacteria
b) Bacteria and Fungi
c) Bacteria and Viruses
d) Algae and Fungi
Some medicines obtained from
micro-organisms are applied to kill or stop the growth of disease-causing
microorganisms. Such medicines are called ___
a) Antibodies
b) Antibiotics
c) Antiseptics
d) All of the above
A common preservative used in
jam and pickles is
a) Sodium benzoate
b) Nitric acid
c) Sodium Chloride
d) Copper Sulphate
Rhizobium found in root nodules
of leguminous roots is an
a) Atmospheric Carbon fixer
b) Atmospheric Oxygen fixer
c) Atmospheric Nitrogen fixer
d) All of the above
Lactobacillus is commonly found
in
a) Cake
b) Curd
c) Bread
d) All of the above
The process of conversion of
sugar into alcohol by yeast is called ___
a) Fermentation
b) Pasteurisation
c) Alcoholism
d) All of the above
The pores in the bread is due to gas bubbles
of
a) Oxygen
b) Nitrogen dioxide
c) Nitrogen
d) Carbon di oxide
Deliberately injecting weak
microbes into a healthy body and producing antibodies to fight against strong
microbes is called ____
a) Medication
b) Antibiotics
c) Vaccination
d) All of the above
The microbe for Malaria is
carried by
a) Male Anopheles mosquito
b) Female Anopheles Mosquito
c) Male Aedes mosquito
d) Female Aedes mosquito
Microorganisms are
a) Multi-cellular
b) Unicellular
c) Unicellular and multi-cellular
d) None of the options
Penicillium is a
a) Fungus
b) Algae
c) Bacteria
d) Yeast
Malaria Is caused by
a) Protozoa
b) Virus
c) Algae
d) Bacteria
Rhizobium bacteria ___
a) Help in nitrogen fixation
b) Help in digestion
c) Cause diseases
d) All of these
Scientist who discovered
fermentation is
a) Louis Pasteur
b) Alexander fleming
c) John mendal
d) Edward jenner
Amoeba belongs to ____
a) Protozoa
b) Algae
c) Fungi
d) Virus
Mushroom belongs to
a) Fungi
b) Algae
c) Virus
d) None of the options
Amount of nitrogen in the atmosphere
is
a) 0.78
b) 0.58
c) 0.68
d) 0.88
Vaccine for small pox is discovered
by
a) Edward jenner
b) Louis pasteur
c) Alexander Fleming
d) John mendal
Spirogyra is ____
a) A fungi
b) An algae
c) A protozoa
d) A bacteria
In Pasteurisation the milk is
heated to about:
(a) 100°C
(b) 50°C
(c) 70°C
(d) 110°C
Scientist who discovered
fermentation is
(a) Alexander Fleming
(b) Louis Pasteur
(c) John Mendal
(d) Edward Jenne
What helps in the rise of bread
or dosa dough?
(a) Heat
(b) Grinding
(c) Growth of yeast cells
(d) Low pressure
Yeast is not used in the preparation
of:
(a) bread
(b) alcohol
(c) dhokla
(d) antibiotic
Which of the following enzymes
is secreted by bacteria that can digest cellulose?
(a) Amylase
(b) Cellulose
(c) Lipase
(d) Protease
Examples of Multicellular
Microorganism are
(a) Algae, Bacteria
(b) Bacteria and Fungi
(c) Bacteria and Viruses
(d) Algae and Fungi
Virus reproduce:
(a) only outside the cells of the host organisms
(b) only inside the cells of
the host organisms
(c) both inside and outside the cells of the host organisms
(d) none of these
A plant disease called citrus
canker is caused by a ____
(a) Virus
(b) Protozoa
(c) Bacteria
(d) Fungi
What process takes place when
yeast is added to grape juice and left for a week?
(a) Decomposition
(b) Fermentation
(c) Distillation
(d) Oxidation
Malaria is spread by:
(a) plasmodium
(b) female anopheles
mosquito
(c) male anopheles mosquito
(d) none of these
Chapter 3
Synthetic Fibres and Plastics
A chain of small chemical units combined to form a large single
unit is called ____
a) Polymer
b)
Poly
c)
Polythene
d)
None of the above
Polythene and PVC are examples of
a)
Bio degradable substance
b)
Thermosetting plastics
c) Thermoplastics
d)
Rayon
Plastics which when mounded once cannot be softened by heating.
Such plastics are called ____
a)
Polythene
b)
Thermoplastics
c) Polyester
d) Thermosetting plastics
Polycot is made by mixing two types of fibres namely
a)
Silk + Cotton
b)
Polythene + cotton
c)
Silk + Polyester
d) Polyester + Cotton
The 4 R Principle is
a) Reduce, Reuse, Recycle, Recover
b)
Remember, reduce, and Recycle, Rejoice
c)
Repeat, Rejoice, recycle, reduce
d)
None of the above
_____________ is an example of natural polymer
a)
Rayon
b) Cellulose
c)
Nylon
d)
All of the above
Which of the following is Non-biodegradable
a)
Woolen clothes
b) Plastic bag,
c)
Cotton cloth
d)
Wood
Bakelite and Melamine are examples of
a) Thermosetting plastics
b)
Silk
c)
Nylon
d)
Rayon
Fire proof plastic uniform worn by fire fighters has a coating of
____ to make it fire resistant.
a)
Nylon
b)
Rayon
c) Melamine plastic
d)
Silk
The coating on modern non- stick cookware and electric iron is of
a) Terry
cot
b)
Rayon
c)
Polyester
d) Teflon
Polyester is made of repeating
units of chemical called as -
(A) Ester
(B) Cotton
(C) Ether
(D) none of these
Petroleum is the main source of
-
(A) Silk
(B) Plastic
(C) Cotton
(D) None of these
Photo chromic glass contains
-
(A) Silver bromide
(B) Silver iodide
(C) Silver chloride
(D) All the above
Which of the following is used
in endoscopy-
(A) Optical fibres
(B) Glass fibres
(C) Glass wool
(D) None of these
Purple-blue coloured glass is
obtained by the addition of -
(A) Chromium salts
(B) Ferrous oxide
(C) Cobalt salts
(D) None of the above
Terra Cotta is -
(A) Kaolin
(B) Clay
(C) Unglazed primitive pottey
(D) Porcelain
Which of the following is a
natural polymer-
(A) Cellulose
(B) Nylon
(C) Polythene
(D) PVC
Which of the following have
long-chains of protein -
(A) Jute
(B) Cotton
(C) Silk and wool
(D) All the above
Thermocole is made from -
(A) Polythene
(B) Polystyrene
(C) Perspex
(D) Teflon
Which of the following is
thermoplastic -
(A) Polythene
(B) Bakelite
(C) Both the above
(D) None of the above
Contacts lenses are made from -
(A) Polyvinyl chloride
(B) Polystyrene
(C) Lucite
(D) Teflon
Which of the following are
thermosets-
(A) Formica and Melamine
(B) Polystyrene
(C) Polythene
(D) Thermocole
Which of the following is
similar to cotton?
(A) Nylon
(B) Dacron
(C) Rayon
(D) Terylene
Which of the following do not
soften upon heating -
(A) Lucite
(B) Bakelite
(C) Polystyrene
(D) Polythene
Which of the following does not
produce insoluble carbonates in hard water-
(A) Soap
(B) Detergents
(C) Both the above
(D) None of these
Which of the following is
alkaline in nature -
(A) Soap
(B) Detergents
(C) Both the above
(D) None of these
The correct formula of washing soda
is -
(A) Na2CO3
(B) Na2CO3.H2O
(C) Na2CO3.9H2O
(D) Na2CO3.10H2O
If tartaric acid is not added in
baking powder, the cake will taste bitter due to the presence of -
(A) Sodium hydrogen carbonates
(B) Carbon dioxide
(C) Sodium carbonate
(D) All of these
Soda-acid fire extinguisher
extinguishes the fire -
(A) By cutting the supply of air
(B) by removing the combustible substance
(C) By raising the ignition temperature
(D) None of these
The simplest formula of
bleaching powder is -
(A) Ca(OCl2)
(B) CaOCl2
(C) CaOCl2.H2O
(D) Ca(OCl2).2H2O
Which of the following fibre is
natural polymer:
(a) rayon
(b) cotton
(c) polyester
(d) polythene
PET is a very familiar form of
(a) chemical
(b) monomer
(c) polyester
(d) polyphenyl
Which Of The Following Is Not A
Common Property Of Plastic?
(a) Non-reactive
(b) Light in weight
(c) Durable
(d) Good conductor of
electricity
The Material Similar To Silk In
Appearance Is:
(a) Nylon
(b) Rayon
(c) Polyester
(d) Terylene
Raw materials for preparation of
synthetic fibers are obtained from
(a) coal
(b) petroleum
(c) natural gas
(d) all of these
In Which Of The Following
Statement Is Or Are Incorrect?
(a) Cotton fabrics do not
wrinkle easily.
(b) Teflon is used to make non-stick cookware.
(c) Rayon is prepared by using wood pulp.
(d) Nylon is used for making parachute and stockings.
Which of the following is not
thermoplastics:
(a) acrylic
(b) polyethylene
(c) polystyrene
(d) melamine
Cellulose is made up of a large
number of ………………… units.
(a) Glucose
(b) fructose
(c) protein
(d) none of these
The plastic used for making water
pipes:
(a) Melamine
(b) PVC
(c) Polyester
(d) Bakelite
Which of the following is a bad
conductor of electricity?
(a) Plastic
(b) Copper
(c) Steel
(d) Brass
A chain of small chemical units
combined to form a large single unit is called ____
(a) Polymer
(b) Poly
(c) Polythene
(d) None of the above
Polythene and PVC are examples
of
(a) Bio degradable substance
(b) Thermosetting plastics
(c) Thermoplastics
(d) Rayon
Plastics which when moulded once
cannot be softened by heating. Such plastics are called ____
(a) Polythene
(b) Thermoplastics
(c) Polyester
(d) Thermosetting plastics
Polycot is made by mixing two
types of fibres namely
(a) Silk + Cotton
(b) Polythene + cotton
(c) Silk + Polyester
(d) Polyester + Cotton
The 4 R Principle is
(a) Reduce, Reuse, Recycle,
Recover
(b) Remember, reduce, Recycle, Rejoice
(c) Repeat, Rejoice, recycle, reduce
(d) None of the above
Question._____________ is an
example of natural polymer
(a) Rayon
(b) Cellulose
(c) Nylon
(d) All of the above
Which of the following is Non-biodegradable
(a) Woolen clothes
(b) Plastic bag,
(c) Cotton cloth
(d) Wood
Bakelite and Melamine are
examples of
(a) Thermosetting plastics
(b) Silk
(c) Nylon
(d) Rayon
Fire proof plastic uniform worn
by fire fighters has a coating of _____ to make it fire resistant.
(a) Nylon
(b) Rayon
(c) Melamine plastic
(d) Silk
The coating on modern non- stick
cookware and electric iron is of
(a) Terrycot
(b) Rayon
(c) Polyester
(d) Teflon
Which of the following is a
natural fibre?
(a) Wool
(b) Nylon
(c) PVC
(d) Polythene
Which of the following is a
characteristic of plastics?
(a) Electrical conductors
(b) Heat conductors
(c) Biodegradable
(d) Non-biodegradable
Pick The Synthetic Fibre Out Of
The Following:
(a) Cotton
(b) Nylon
(c) Jute
(d). Wool
The plastic which cannot be
recycled is
(a) jute
(b) rayon
(c) petrochemicals
(d) Bakelite
Which of the following are made
from thermosetting plastic?
(a) Bottles
(b) Crockery
(c) Shoes
(d) Handbags
Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon
Which of the following once set
do not soften on heating:
(a) thermoplastic
(b) thermosetting plastic
(c) polvthene
(d) none of these
Which of the following is natural
fibre obtained from plants?
(a) Cotton
(b) Wool
(c) Rayon
(d) Ketone
Which of the following cannot be
recycled:
(a) plastic toys
(b) plastic bowls
(c) plastic covering on
electric wires
(d) ball point pens
Polymer present in plants
is:
(a) cellulose
(b) nylon
(c) rubber
(d) P.V.C.
Synthetic fibers are:
(a) strong
(b) durable
(c) hining
(d) all of these
Which of the following garbage
is biodegradable:
(a) broken plastics things
(b) fruit peels
(c) cement
(d) iron wastes
Paheli Is Writing Some Statements.
She Wants To Know In Which Of The Following Statements Is Or Are Incorrect?
(a) The fabric terry wool is obtained by mixing terylene and wool.
(b) It is risky to wear synthetic clothes while working in the kitchen.
(c) Most of the plastics are biodegradable.
(d) Synthetic fibres do not
melt on heating.
Which of the following is
obtained from hair of an animal:
(a) nylon
(b) silk
(c) cotton
(d) wool
A synthetic fibre resembling
wool is:
(a) rayon
(b) nylon
(c) acrylic
(d) none of these
Which of the following is
natural fibre?
(a) Rayon
(b) Nylon
(c) Polyester
(d) Cotton
Which of the following is used
to make non-stick cookwares:
(a) polyester
(b) Teflon
(c) rayon
(d) nylon
Polycot Is Obtained By Mixing:
(a) Nylon and wool
(b) Polyester and wool
(c) Nylon and cotton
(d) Polyester and cotton
Which of the following fibre has
highest tensile strength?
(a) Cotton
(b) Silk
(c) Rayon
(d) Nylon
PET is form of:
(a) steel
(b) glass
(c) polyester
(d) nylon
Chapter 4
MATERIALS: METALS AND NON-METALS
The property of metals by which they can be beaten into thin
sheets is called ____
a) Ductility
b) Sheetability
c) Metallic
d) Malleability
The property of metal by which it can be drawn into wires is
called ______
a) Ductility
b) Sheetability
c) Metallic
d) Malleability
The metal found in liquid state is
a) Iron
b) Aluminium
c) Mercury
d) Gold
When a copper vessel is exposed to moist air for long, it acquires
a dull green coating. The green material is a mixture of
a) Copper
oxide and Copper Nitrate
b) Copper hydroxide & Copper Carbonate
c) Copper
carbonate and Copper sulphate
d) Copper
hydroxide and Copper Nitrate
When sulphur dioxide is dissolved in water __________ is formed.
a) Sulphuric
acid
b) Sulphoxy
acid
c) Sulphurous acid
d) Sulphur
trioxide
Sodium metal is stored in
a) Water
b) Kept
under open air
c) Alcohol
d) Kerosene
Phosphorus is stored in
a) Water
b) Kept
under open air
c) Alcohol
d) Kerosene
Since metals produce ringing sounds, they are said to be ____.
a)
Sound metal
b) Sonorous
c) Ring
metal
d) Malleable
A substance which cannot be broken down further by chemical
reactions, by cooling, heating, or by electrolysis, is called ___
a) Metal
b) Non
Metal
c) Element
d) Compound
They are not sonorous and are poor conductors of heat and
electricity. These materials are
a) Elements
b) Metals
c) Compound
d) Non metals
The property of metals by which
they can be beaten into thin sheets is called ____
a) Ductility
b) Sheetability
c) Metallic
d) Malleability
The property of metal by which
it can be drawn into wires is called ______
a) Ductility
b) Sheetability
c) Metallic
d) Malleability
The metal found in liquid state
is
a) Iron
b) Aluminium
c) Mercury
d) Gold
When a copper vessel is exposed
to moist air for long, it acquires a dull green coating. The green material is
a mixture of
a) Copper oxide and Copper Nitrate
b) Copper hydroxide &
Copper Carbonate
c) Copper carbonate and Copper sulphate
d) Copper hydroxide and Copper Nitrate
When sulphur dioxide is
dissolved in water __________ is formed.
a) Sulphuric acid
b) Sulphoxy acid
c) Sulphurous acid
d) Sulphur trioxide
Sodium metal is stored in
a) water
b) Kept under open air
c) alcohol
d) Kerosene
Phosphorus is stored in
a) water
b) Kept under open air
c) alcohol
d) Kerosene
Since metals produce ringing
sounds, they are said to be ____.
a) Sound metal
b) Sonorous
c) Ring metal
d) malleable
A substance which cannot be
broken down further by chemical reactions, by cooling, heating, or by
electrolysis, is called ______
a) Metal
b) Non Metal
c) Element
d) Compound
They are not sonorous and are
poor conductors of heat and electricity. These materials are
a) elements
b) Metals
c) Compound
d) Non metals
When non-metals react with water
then
a) Non-metals do not react with water
b) Hydrogen gas is formed
c) Carbon dioxide gas is formed
d) None of the options
The metal which can be cut with
a knife
a) Sodium and potassium
b) Barium and calcium
c) Sodium and mercury
d) Potassium and calcium.
Metal oxides are of nature
a) Basic
b) Acidic
c) Neutral
d) None of the options
All metals are solids except
a) Mercury
b) Sodium
c) Calcium
d) Hydrogen
Materials around us can be
classified into
a) Metals and non-metals
b) Elements and compounds
c) Acids and bases
d) None of the options
The non-metal which is liquid at
room temperature is:
a) Bromine
b) Carbon
c) Iodine
d) Chlorine
The metal which is stored in
kerosene:
a) Sodium
b) Phosphorus
c) Magnesium
d) Magnesium
Non-metals are:
a) Generally solids and gases
b) Generally liquids
c) Generally gases
d) Generally gases and liquids.
The liquid metal at room
temperature
a) Mercury
b) Bromine
c) Sodium
d) Gold
The most reactive metal is:
a) Potassium
b) Iron
c) Gold
d) Zinc
What is the product when sulphur
reacts with oxygen?
a) Sulphur dioxide
b) Sulphurous acid
c) Sulphuric acid
d) Sulphur trioxide
The solution of ash of magnesium
ribbon is
a) Basic
b) Acidic
c) Neutral
d) All of the options
Which metal is found in liquid
state t room temperature?
a) Hg
b) Zn
c) Fe
d) Al
The metals that produce ringing
sounds, are said to be
a) Sonorous
b) Malleable
c) Lustrous
d) Hard
The property of metal by which
it can be drawn into wires is called
a) Ductility
b) Decorating
c) Malleability
d) Conductivity
Which one of the following is a
good conductor of electricity?
a) Iron
b) Plastic
c) Wood
d) Glass
All materials shown property of
malleability expect
a) Graphite
b) Iron
c) Aluminium
d) Silver
The property of metals by which
they can be beaten in to thin sheets is called
a) Malleability
b) Ductility
c) Conduction
d) Expansion
Which one of the following is
metal?
a) Na
b) N
c) O
d) C
Which one of the following is
non metal?
a) N
b) Fe
c) Al
d) Zn
Which gas are produced when
metal react with acids
a) Hydrogen
b) Carbon dioxide
c) Nitrogen
d) Oxygen
What is the chemical formula of
copper sulphate?
a) Cuco3
b) Cuso4
c) Cucl2
d) Cuo
Which non-metal catches fire if
the exposed to air
a) Phosphorous
b) Sodium
c) Calcium
d) Uranium
Which metal is present in
Calcium Hydroxide?
a) Ca
b) C
c) O
d) H
Which one of the following metal
reacts vigorously with oxygen and water?
a) Sodium
b) Potassium
c) Calcium
d) Magnesium
Sodium metal is stored in
a) Kerosene
b) Water
c) Alcohol
d) Ether
Oxides of non metals are ____
a) Acidic
b) Basic
c) Neutral
d) All of the options
The sulphuric acid turns blue
litmus paper into
a) Red
b) Green
c) Yellow
d) Dark blue
What is the chemical formula of
sulphurous acid?
a) H2SO3
b) H2SO4
c) SO2
d) SO3
When sulphur dioxide is dissolve
in water then
a) Sulphuric acid is formed
b) Sulphurous acid is formed
c) Sulphur trioxide is formed
d) Sulphur is formed
Which one of the following is
applied on wounds as an antiseptic?
a) Non metals
b) Metals
c) Metalloids
d) All of the options
Non metals used in
a) Fertilisers
b) Aero planes
c) Making machinery
d) Water boilers
Which non metal is essential for
our life and inhale during breathing?
a) O
b) H
c) C
d) N
Which gas produced by piece of
burning charcoal?
a) CO
b) CO2
c) H2S
d) O2
On burning metals react with
oxygen to produce
a) Metal oxide
b) Metal sulphate
c) Metal chloride
d) Metal hydroxide
What happens when dilute
sulphuric acid is poured on a copper plate?
a) Copper sulphate formed
b) Zinc sulphate formed
c) Copper chloride formed
d) Zinc sulphate formed
Which of the following
statements are correct?
a) Generally metals are ductile
b) Some metals are ductile
c) All metals are ductile
d) All non metals are ductile
Which of the following can be
beaten in to thin sheets?
a) Zinc
b) Phosphorus
c) Sulphur
d) Oxygen
Which one of the following gas
burns with the pop - sound?
a) Hydrogen
b) Oxygen
c) Chlorine
d) Hydrogen sulphide
Which one of the following does
not react with acids?
a) O
b) Cu
c) Ni
d) Cr
Which substance is present in
fuel?
a) Carbon
b) Copper
c) Iron
d) Gold
Which one of the following can’t
be drawn into wires?
a) Coal
b) Cu
c) Al
d) Fe
Which one of the following metal
is used thermometers?
a) Mercury
b) Copper
c) Aluminium
d) Iron
Gold is used in
a) Jewellery
b) Thermometers
c) Fuel
d) Machinery
Which material is hard in
nature?
a) Iron
b) Coal
c) Oxygen
d) Wood
Which material show shiny
appearance?
a) Aluminium
b) Coal
c) Sulphur
d) Carbon
Which one of the following is
the good conductor of electricity?
a) Iron rod
b) Sulphur
c) Coal piece
d) Wood
Which one of the following are
very reactive non metals
a) Phosphorous
b) Carbon
c) Potassium
d) Sodium
Copper sulphate (CuSO4)
possesses
a) Blue colour
b) Red colour
c) Green colour
d) Yellow colour
Which metal is found in plants?
a) Mg
b) Fe
c) Cr
d) CO
Moist air is the combination of
a) H2O+CO2+O2
b) H2O+ CO+O2
c) H2O+CO2+H2
d) H2O+O2+H2
Heat conduction is the property
of
a) Metal
b) Non-metal
c) Metalloids
d) All of the options
Which of the following can’t be
beaten into sheets?
a) Sulphur
b) Aluminium
c) Iron
d) Zinc
Hydrogen gas produce when metal
react with
a) Base
b) Acid
c) Salt
d) Both acid & base
Which one of the following is in
crackers?
a) Non-metal
b) Metals
c) Semi metals
d) All of the options
Which one of the following
enhances the growth of plants?
a) Fertilisers
b) Industrial gadgets
c) Automobiles
d) Water boilers
Which one of the following is
used for decorating sweets?
a) Silver foil
b) Aluminium foil
c) Copper foil
d) All of the options
Aluminium foil used for wrapping
a) Food
b) Clothes
c) Plastic
d) Wires
Metallic oxides are-
a) Basic in nature
b) Acidic is nature
c) Neutral
d) Either acidic or basic
Zinc replaces copper from-
a) Copper sulphate
b) Zinc sulphate
c) Sulphuric acid
d) Copper oxide
Which substance is present in fuel?
a) Carbon
b) Gold
c) Iron
d) Copper
Which one of the following can’t
be drawn into wires?
a) Coal
b) Cu
c) Al
d) Fe
Which one of the following metal
is used thermometers
a) Mercury
b) Copper
c) Aluminium
d) Iron
Gold is used in
a) Jewellery
b) Machinery
c) Fuel
d) Thermometers
Which material is hard in nature?
a) Iron
b) Coal
c) Oxygen
d) Wood
Which material show shiny
appearance
a) Aluminium
b) Sulphur
c) Coal
d) Carbon
Which one of the following is
the good conductor of electricity?
a) Iron rod
b) Sulphur
c) Coal piece
d) Wood
Which one of the following are
very reactive non metals
a) Phosphorous
b) Carbon
c) Potassium
d) Sodium
Copper sulphate (CuSO4)
possesses
a) Blue colour
b) Green colour
c) Yellow colour
d) Red colour
Which metal is found in plants?
a) Mg
b) CO
c) Cr
d) Fe
Which one of the following is
applied on wounds as an antiseptic?
a) Non metals
b) Metals
c) Metalloids
d) All the options
Non metals used in
a) Fertilisers
b) Water boilers
c) Making machinery
d) Aero planes
Which non metal is essential for
our life and inhale during breathing?
a) O
b) C
c) H
d) N
Which gas produced by piece of
burning charcoal
a) CO
b) H2S
c) O2
d) CO2
On burning metals react with
oxygen to produce
a) Metal oxide
b) Metal sulphate
c) Metal chloride
d) Metal hydroxide
What happens when dilute
sulphuric acid is poured on a copper plate?
a) Copper sulphate formed
b) Zinc sulphate formed
c) Copper chloride formed
d) Zinc sulphate formed
Which of the following
statements are correct?
a) Generally metals are ductile
b) All non metals are ductile
c) Some metals are ductile
d) All metals are ductile
Which of the following can be
beaten in to thin sheets?
a) Zinc
b) Phosphorus
c) Sulphur
d) Oxygen
Which one of the following gas
burns with the pop sound
a) Hydrogen
b) Chlorine
c) Oxygen
d) Hydrogen sulphide
Which one of the following does
not react with acids?
a) O
b) Cr
c) Ni
d) Cu
Consider The Following
Statements And Choose The Incorrect One:
(a) Atom is the smallest part of an element.
(b) An element is a substance which is made up of only one kind
of atoms.
(c) An atom of liquid sulphur or vapour forms of sulphur would be
different as that of solid sulphur.
(d) Oxygen and nitrogen are two examples of elements.
The metal which is liquid at
room temperature is
(a) Sodium
(b) Bromine
(c) Calcium
(d) Mercury
Which of the following dissolves
in water to form sulphuric acid?
(a) Sulphur dioxide
(b) Sulphur
(c) Sulphur trioxide
(d) Copper sulphate
Which non-metal is used in
making glass?
(a) Graphite
(b) Sulphur
(c) Silica
(d) None of these
Brass is an alloy of:
(a) Zinc – copper- tin
(b) Copper – tin
(c) Zinc – copper
(d) Zinc – tin
Phosphorus combines with oxygen
to form oxides. How many types of oxides are formed by it?
(a) One
(b) Two
(c) Three
(d) Four
The best electrical conductor is ….
(a) Gold
(b) Copper
(c) Silver
(d) Aluminium
Non-rpetals
(a) React with water
(b) Do not react with water
(c) Both (a) and (b)
(d) None of these
The metal which is not corroded
by air, water and acid is
(a) Copper
(b) Zinc
(c) Aluminium
(d) Gold
Metal are hard but _____ can be
cut with a knife
(a) Iron
(b) Potassium
(c) Mercury
(d) Magnesium
They are not sonorous and are
poor conductors of heat and electricity. These materials are
a) Non metals
b) Metals
c) Elements
d) Compound
A substance which cannot be
broken down further by chemical reactions, by cooling, heating, or by
electrolysis, is called ___
a) Element
b) Metal
c) Non Metal
d) Compound
Since metals produce ringing
sounds, they are said to be ____.
a) Sonorous
b) Sound metal
c) Ring metal
d) Malleable
Phosphorus is stored in
a) Water
b) Kerosene
c) Kept under open air
d) Alcohol
Sodium metal is stored in
a) Kerosene
b) Water
c) Kept under open air
d) Alcohol
When sulphur dioxide is
dissolved in water __________ is formed.
a) Sulphurous acid
b) Sulphuric acid
c) Sulphoxy acid
d) Sulphur trioxide
When a copper vessel is exposed
to moist air for long, it acquires a dull green coating. The green material is
a mixture of
a) Copper hydroxide & Copper Carbonate
b) Copper oxide and Copper Nitrate
c) Copper carbonate and Copper sulphate
d) Copper hydroxide and Copper Nitrate
The metal found in liquid state
is
a) Mercury
b) Iron
c) Aluminium
d) Gold
The property of metal by which
it can be drawn into wires is called ____
a) Ductility
b) Sheetability
c) Metallic
d) Malleability
The property of metals by which
they can be beaten into thin sheets is called ____
a) Malleability
b) Ductility
c) Sheetability
d) Metallic
What is the product when sulphur
reacts with oxygen
a) Sulphur dioxide
b) Sulphur trioxide
c) Sulphurous acid
d) Sulphuric acid
The solution of ash of magnesium
ribbon is
a) Basic
b) All the options
c) Neutral
d) Acidic
Which metal is found in liquid
state t room temperature?
a) Hg
b) Zn
c) Fe
d) Al
The metals that produce ringing
sounds, are said to be-
a) Sonorous
b) Hard
c) Lustrous
d) Malleable
The property of metals by which
they can be beaten in to thin sheets is called
a) Malleability
b) Expansion
c) Ductility
d) Conduction
Which one of the following is
metal?
a) Na
b) N
c) C
d) O
Which one of the following is
non metal?
a) N
b) Fe
c) Al
d) Zn
All materials shown property of
malleability expect
a) Graphite
b) Iron
c) Aluminium
d) Silver
Which one of the following is a
good conductor of electricity?
a) Iron
b) Plastic
c) Wood
d) Glass
The property of metal by which
it can be drawn into wires is called
a) Ductility
b) Conductivity
c) Malleability
d) Decorating
Which gas are produced when
metal react with acids
a) Hydrogen
b) Carbon dioxide
c) Nitrogen
d) Oxygen
What is the chemical formula of
copper sulphate?
a) CuCO3
b) CuSO4
c) CuCl2
d) CuO
Which non-metal catches fire if
the exposed to air
a) Phosphorous
b) Sodium
c) Calcium
d) Uranium
Which metal is present in
Calcium Hydroxide
a) Ca
b) H
c) O
d) C
Which one of the following metal
reacts vigorously with oxygen and water?
a) Sodium
b) Calcium
c) Potassium
d) Magnesium
Sodium metal is stored in-
a) Kerosene
b) Ether
c) Alcohol
d) Water
ides of non metals are ____ in
nature
a) Acidic
b) Neutral
c) Basic
d) All the options
The sulphuric acid turns blue litmus
paper into
a) Red
b) Green
c) Yellow
d) Dark blue
What is the chemical formula of
sulphurous acid?
a) H2SO3
b) SO3
c) SO2
d) H2SO4
When sulphur dioxide is dissolve
in water then
a) Sulphuric acid is formed
b) Sulphurous acid is formed
c) Sulphur trioxide is formed
d) Sulphur is formed
Which of the following is not a
heavy metal?
(A) Cu
(B) Hg
(C) Pb
(D) K
Gold is mixed with copper to
(A) make gold soft
(B) make gold hard
(C) make gold more yellowish
(D) give gold luster
Metal surface reacts with oxygen
and the moisture present in air and get coated with
(A) oxide
(B) carbonate
(C) hydroxide
(D) any of these
Eating away of metals by water,
oxygen and other chemicals is called
(A) carbonization
(B) amalgamation
(C) oxidation
(D) corrosion
Rusting of iron requires the
presence of
(A) Air and water
(B) CO2 and water
(C) O2 and H2
(D) O2 and N2
Al forms
(A) Basic oxide
(B) Amphoteric oxide
(C) Acidic oxide
(D) None of the above
Corrosion of metals can be
prevented when contact between metal and_____ is cut off.
(A) Nitrogen
(B) hydrogen
(C) oxygen
(D) carbon
Iron is galvanised when it is
dipped in
(A) molten zinc
(B) molten copper
(C) molten carbon
(D) molten gold
The process of giving a coating
of_____ to copper or brass is called tinning.
(A) Zinc
(B) copper
(C) tin
(D) iron
Metal which reacts vigorously
with HCI to produce salt and hydrogen is
(A) Na
(B) Zn
(C) Sn
(D) Pb
Cu + HCl →
(A) react vigorously
(B) no reaction
(C) react modestly
(D) react slowly
The nonmetal capable of gaining
as well as losing an electron is
(A) Hg
(B) Ca
(C) Ag
(D) H
The metal with which hydrogen
reacts to form metal hydride is
(A) Hg
(B) Ca
(C) Ag
(D) H
Nonmetals combine with oxygen to
produce
(A) acidic oxides
(B) basic oxide
(C) amphoteric oxide
(D) none of these
The oxides of nonmetal which is
neutral is
(A) SO2
(B) NO2
(C) P2O3
{D) CO
Phosphorus combines with oxygen
to form _____ types of oxides.
(A) Three
(B) two
(C) one
(D) four
____ dissolves in water to
produce sulphuric acid.
(A) SO2
(B) S
(C) SO3
(D) 2S
Nonmetals + acids ®?
(A) React slow
(B) react violently
(C) react moderately
(D) no reaction
Nonmetals react with hydrogen to
form
(A) covalent compounds
(B) ionic compounds
(C) electrovalent compounds
(D) coordinate compounds
P4 + 6Cl2 →
(A) 2P2Cl6
(B) 4PCl3
(C) PCl6
(D) P2Cl5
Mercury is used in thermometers because
(A) it does not wet the glass
(B) it expands on heating
(C) it is a liquid
(D) all of these
____________ is used to make
photographic films.
(A) Sodium chloride
(B) silver bromide
(C) potassium iodide
(D) copper chloride
A crucible used in lab to heat
solid at high temperature is made of
(A) sulphur
(B) silicon
(C) graphite
(D) phosphorus
The nonmetal used to treat
rubber in the process of vulcanisation is
(A) Sulphur
(B) phosphorus
(C) Carbon
(D) chloride
Match–head contains
(A) N2
(B) I2
(C) P
(D) C
______ is used in the
hydrogenation of vegetable oils.
(A) Cl2
(B) N2
(C) O2
(D) H2
Due to its semiconductor properties,
the nonmetal used in computers, TV, etc. is
(A) Carbon
(B) silicon
(C) Bromine
(D) fluorine
In the native state of metal, it
is present
(A) as a mixture with a metal
(B) in free state
(C) as a mixture with a nonmetal
(D) as a mixture with a compound
Which of the following metal is
present in native state?
(A) Platinum
(B) Iron
(C) Potassium
(D) Copper
Which of the following is called
as noble metal?
(A) Mercury
(B) Gold
(C) Lithium
(D) Cesium
Which of the following statement
is true?
(A) All minerals are ores
(B) All minerals are not
ores
(C) All ores are not minerals
(D) Some ores are minerals
Hematite is an ore of
(A) Fe
(B) Zn
(C) Cu
(D) Al
Fe3O4 is the chemical
formula of
(A) Monazite
(B) magnetite
(C) Hematite
(D) bauxite
Copper, which is extracted from
cuprite, is a/an
(A) Sulphide ore
(B) carbonate ore
(C) Oxide ore
(D) halide ore
Which of the following is a
carbonate ore of copper?
(A) Cuprite
(B) Pyrite
(C) Copper glance
(D) Malachite
Which of the following are the
ores of zinc?
(A) Calamine and zinc blend
(B) Zinc blend and cerrusite
(C) Calomine and siderite
(D) Zinc blend and carnallite
The
metal extracted from limestone, marble and chalk is
(A) sodium
(B) Calcium
(C) Aluminium
(D) iron
The chemical formula of bauxite
is
(A) CaFeS2
(B) MgCO3
(C) Al2O3·2H2O
(D) PbCO3
Rocksalt is
(A) KCl
(B) CaCl2
(C) MgCl2
(D) NaCI
Metals generally have______ number
of electrons in their valence shell.
(A) 1, 2 or 3
(B) 7, 8 or 9
(C) 10, 11 or 12
(D) 5, 6 or 7
Nonmetals contain ____ number of
electrons in their outmost shell.
(A) 1,2 or 3
(B) 8, 9 or 10
(C) 10, 20 or 30
(D) 5, 6 or 7
Nonmetals form
(A) cations
(B) anions
(C) Anions and cation
(D) do not form ions
To become stable, metals
(A) Lose or gain electrons
(B) neither lose or gain electrons
(C) Lose electrons
(D) gain electrons
Metals tends to form
(A) cations
(B) anions
(C) cations and anions
(D) do not form ions
Antimony and arsenic belong to
the category of
(A) Metals
(B) metalloids
(C) Nonmetals
(D) minerals
Nobles gases do not react because
they have ____ electrons in their valence shell.
(A) 3
(B) 6
(C) 1
(D) 8
As we go down in the
electrochemical series of metals, the reactivity
(A) Decreases and then increases
(B) increases and then decreases
(C) Decreases
(D) increases
The element present below
hydrogen in electrochemical series is
(A) Mg
(B) Hg
(C) Pb
(D) Sn
The metal which can replace
magnesium from its salt is
(A) Ca
(B) Al
(C) Zn
(D) Fe
The most reactive of the
following metals is
(A) Ca
(B) Al
(C) Ni
(D) Pb
Metals can be hammered into thin
sheets. This property is called
(A) Density
(B) malleability
(C) Ductility
(D) strength
Metals are malleable and ductile
because
(A) Metals can shine
(B) Metals produce sound
(C) Layers of metal atoms can slip over each other
(D) Atoms form close clusters
Metal which is the best
conductor of electricity
(A) Nickel
(B) silver
(C) Gold
(D) sodium
The colour of iodine is
(A) Violet
(B) green
(C) White
(D) brown
The nonmetal which exhibits
yellow colour is
(A) Silicon
(B) phosphorus
(C) Sulphur
(D) carbon
The nonmetal which is hard is
(A) Sulphur
(B) chlorine
(C) Graphite
(D) diamond
Which of the following is a
property of nonmetals?
(A) Low densities
(B) Low melting points
(C) Poor conductor of electricity
(D) A11 the three
The nonmetal which is a liquid
at room temperature is
(A) Chlorine
(B) nitrogen
(C) Bromine
(D) hydrogen
Metal which does not react with
HCI is
(A) Ag
(B) Mg
(C) Al
(D) Fe
Metals are malleable and ductile
because
(A) Metals can shine
(B) Metals produce sound
(C) Layers of metal atoms can slip over each other
(D) Atoms form close clusters
The metal which can replace
calcium from its salt is
(A) Al
(B) Zn
(C) Fe
(D) K
The most reactive of the
following metals is
(A) Ca
(B) Al
(C) Ni
(D) Pb
Which of the following elements is highly resistant to
corrosion
(A) Iron
(B) Nickel
(C) Silver
(D) Titanium
Metals can be hammered into thin
sheets. This property is called
(A) Density
(B) Malleability
(C) Ductility
(D) Strength
Metal which is the best
conductor of electricity
(A) Nickel
(B) Silver
(C) Gold
(D) Sodium
The non-metal which is hard is
(A) Sulphur
(B) Chlorine
(C) Graphite
(D) Diamond
A non-metal used to preserve
food stuffs
(A) Nitrogen
(B) Phosphorus
(C) Carbon
(D) None
A metal which is liquid at room
temperature is
(A) Hg
(B) Na
(C) K
(D) Al
Which of the following
statements is incorrect?
(A) Metals have no lustre
(B) All metal oxides are basic in nature
(C) Metals have 1, 2 or 3 electrons in the outermost shell
(D) Metals are malleable
Which of the following is the
second most abundant metal in the earth’s crust?
(A) Copper
(B) Aluminium
(C) Iron
(D) Zinc
Metallurgy is a process of
(A) Extracting metal from its mineral
(B) extracting metal from its ore
(C) Extracting pure metal from its ore
(D) extracting metal from its pure ore
Matrix is defined as
(A) The unwanted foreign material present in the ore
(B) The flux added to remove the unwanted impurities from
ore
(C) The slag formed as a result of the reaction of flux with
gangue
(D) The material used in the reduction of metal oxide to
metal
Which of the following is not an
ore of aluminium?
(A) Cryolite
(B) Feldspar
(C) Bauxite
(D) Azurite
The function of adding cryolite
in the extraction of aluminium from pure alumina is
(A) to increase the fusion temperature
(B) to decrease the conductivity of alumina
(C) to decrease the conductivity of alumina
(D) none of these
Which of the following is not a
heavy metal?
(A) Cu
(B) Hg
(C) Pb
(D) K
Gold is mixed with copper to
(A) make gold soft
(B) make gold hard
(C) make gold more yellowish
(D) give gold lustre
Metal surface reacts with oxygen
and the moisture present in air and get coated with
(A) oxide
(B) carbonate
(C) hydroxide
(D) any of these
Eating away of metals by water,
oxygen and other chemicals is called
(A) carbonisation
(B) amalgamation
(C) oxidation
(D) corrosion
Rusting of iron requires the
presence of
(A) air and water
(B) CO2 and water
(C) O2 and H2
(D) O2 and N2
Al forms
(A) Basic oxide
(B) Amphoteric oxide
(C) Acidic oxide
(D) None of the above
Corrosion of metals can be
prevented when contact between metal and___ is cut off.
(A) nitrogen
(B) hydrogen
(C) oxygen
(D) carbon
Iron is galvanised when it is
dipped in
(A) molten zinc
(B) molten copper
(C) molten carbon
(D) molten gold
The process of giving a coating
of_____ to copper or brass is called tinning.
(A) Zinc
(B) copper
(C) tin
(D) iron
Metal which reacts vigorously
with HCI to produce salt and hydrogen is
(A) Na
(B) Zn
(C) Sn
(D) Pb
Cu + HCl →
(A) react vigorously
(B) no reaction
(C) react modestly
(D) react slowly
The nonmetal capable of gaining
as well as losing an electron is
(A) Hg
(B) Ca
(C) Ag
(D) H
The metal with which hydrogen reacts to form metal hydride is
(A) Hg
(B) Ca
(C) Ag
(D) H
Nonmetals combine with oxygen to produce
(A) acidic oxides
(B) basic oxide
(C) amphoteric oxide
(D) none of these
The oxides of nonmetal which is
neutral is
(A) SO2
(B) NO2
(C) P2O3
{D) CO
Phosphorus combines with oxygen
to form .......... types of oxides.
(A) Three
(B) two
(C) one
(D) four
______ dissolves in water to
produce sulphuric acid.
(A) SO2
(B) S
(C) SO3
(D) 2S
Nonmetals + acids → ?
(A) React slow
(B) react violently
(C) react moderately
(D) no reaction
Nonmetals react with hydrogen to
form
(A) covalent compounds
(B) ionic compounds
(C) electrovalent compounds
(D) coordinate compounds
P4 + 6Cl2 →
(A) 2P2Cl6
(B) 4PCl3
(C) PCl6
(D) P2Cl5
Mercury is used in thermometers because
(A) it does not wet the glass
(B) it expands on heating
(C) it is a liquid
(D) all of these
____________ is used to make
photographic films.
(A) Sodium chloride
(B) silver bromide
(C) potassium iodide
(D) copper chloride
A crucible used in lab to heat
solid at high temperature is made of
(A) sulphur
(B) silicon
(C) graphite
(D) phosphorus
The nonmetal used to treat
rubber in the process of vulcanisation is
(A) sulphur
(B) phosphorus
(C) carbon
(D) chloride
Match–head contains
(A) N2
(B) I2
(C) P
(D) C
_____ is used in the
hydrogenation of vegetable oils.
(A) Cl2
(B) N2
(C) O2
(D) H2
Due to its semiconductor properties,
the nonmetal used in computers, TV, etc. is
(A) carbon
(B) silicon
(C) bromine
(D) fluorine
In the native state of metal, it
is present
(A) as a mixture with a metal
(B) in Free State
(C) as a mixture with a nonmetal
(D) as a mixture with a compound
Which of the following metal is
present in native state?
(A) Platinum
(B) Iron
(C) Potassium
(D) Copper
Which of the following is called
as noble metal?
(A) Mercury
(B) Gold
(C) Lithium
(D) Cesium
Which of the following statement
is true?
(A) All minerals are ores
(B) All minerals are not ores
(C) All ores are not minerals
(D) Some ores are minerals
Hematite is an ore of
(A) Fe
(B) Zn
(C) Cu
(D) Al
Fe3O4 is the chemical
formula of
(A) monazite
(B) magnetite
(C) hematite
(D) bauxite
Copper, which is extracted from
cuprite, is a/an
(A) sulphide ore
(B) carbonate ore
(C) oxide ore
(D) halide ore
Which of the following is a
carbonate ore of copper?
(A) Cuprite
(B) Pyrite
(C) Copper glance
(D) Malachite
Which of the following are the
ores of zinc?
(A) Calamine and zinc blend
(B) Zinc blend and cerrusite
(C) Calomine and siderite
(D) Zinc blend and carnallite
The metal extracted from
limestone, marble and chalk is
(A) sodium
(B) Calcium
(C) Aluminium
(D) iron
The chemical formula of bauxite
is
(A) CaFeS2
(B) MgCO3
(C) Al2O3·2H2O
(D) PbCO3
Rock salt is ----
(A) KCl
(B) CaCl2
(C) MgCl2
(D) NaCI
Metals generally have _____ number
of electrons in their valence shell.
(A) 1, 2 or 3
(B) 7, 8 or 9
(C) 10, 11 or 12
(D) 5, 6 or 7
Nonmetals contain ______ number
of electrons in their outmost shell.
(A) 1,2 or 3
(B) 8, 9 or 10
(C) 10, 20 or 30
(D) 5, 6 or 7
Nonmetals form
(A) cations
(B) anions
(C) anions and cation
(D) do not form ions
To become stable, metals
(A) lose or gain electrons
(B) neither lose or gain electrons
(C) lose electrons
(D) gain electrons
Metals tends to form
(A) cations
(B) anions
(C) cations and anions
(D) do not form ions
Antimony and arsenic belong to
the category of
(A) metals
(B) metalloids
(C) nonmetals
(D) minerals
Nobles gases do not react
because they have ____ electrons in their valence shell.
(A) 3
(B) 6
(C) 1
(D) 8
As we go down in the
electrochemical series of metals, the reactivity
(A) decreases and then increases
(B) increases and then decreases
(C) decreases
(D) increases
The element present below
hydrogen in electrochemical series is
(A) Mg
(B) Hg
(C) Pb
(D) Sn
The metal which can replace
magnesium from its salt is
(A) Ca
(B) Al
(C) Zn
(D) Fe
The most reactive of the
following metals is
(A) Ca
(B) Al
(C) Ni
(D) Pb
Metals can be hammered into thin
sheets. This property is called
(A) density
(B) malleability
(C) ductility
(D) strength
Metals are malleable and ductile
because
(A) metals can shine
(B) metals produce sound
(C) layers of metal atoms
can slip over each other
(D) atoms form close clusters
Metal which is the best
conductor of electricity
(A) nickel
(B) silver
(C) gold
(D) sodium
The colour of iodine is
(A) violet
(B) green
(C) white
(D) brown
The nonmetal which exhibits
yellow colour is
(A) silicon
(B) phosphorus
(C) sulphur
(D) carbon
The nonmetal which is hard is
(A) sulphur
(B) chlorine
(C) graphite
(D) diamond
Which of the following is a
property of nonmetals?
(A) Low densities
(B) Low melting points
(C) Poor conductor of electricity
(D) A11 the three
The nonmetal which is a liquid
at room temperature is
(A) chlorine
(B) nitrogen
(C) bromine
(D) hydrogen
Metal which does not react with
HCI is
(A) Ag
(B) Mg
(C) Al
(D) Fe
Metals are malleable and ductile
because
(A) Metals can shine
(B) Metals produce sound
(C) Layers of metal atoms
can slip over each other
(D) Atoms form close clusters
The metal which can replace
calcium from its salt is
(A) Al
(B) Zn
(C) Fe
(D) K
The most reactive of the
following metals is
(A) Ca
(B) Al
(C) Ni
(D) Pb
Which of the following elements
is highly resistant to corrosion
(A) Iron
(B) Nickel
(C) Silver
(D) Titanium
Metals can be hammered into thin
sheets. This property is called
(A) Density
(B) Malleability
(C) Ductility
(D) Strength
Metal which is the best
conductor of electricity
(A) Nickel
(B) Silver
(C) Gold
(D) Sodium
The non-metal which is hard is
(A) Sulphur
(B) Chlorine
(C) Graphite
(D) Diamond
A non-metal used to preserve
food stuffs
(A) Nitrogen
(B) Phosphorus
(C) Carbon
(D) None
A metal which is liquid at room
temperature is
(A) Hg
(B) Na
(C) K
(D) Al
Which of the following
statements is incorrect?
(A) Metals have no lustre
(B) All metal oxides are basic in nature
(C) Metals have 1, 2 or 3 electrons in the outermost shell
(D) Metals are malleable
Which of the following is the
second most abundant metal in the earth’s crust?
(A) Copper
(B) Aluminium
(C) Iron
(D) Zinc
Metallurgy is a process of
(A) extracting metal from its mineral
(B) extracting metal from its ore
(C) extracting pure metal
from its ore
(D) extracting metal from its pure ore
Matrix is defined as
(A) the unwanted foreign material present in the ore
(B) the flux added to remove the unwanted impurities from ore
(C) the slag formed as a
result of the reaction of flux with gangue
(D) the material used in the reduction of metal oxide to metal
Which of the following is not an
ore of aluminium?
(A) Cryolite
(B) Feldspar
(C) Bauxite
(D) Azurite
The function of adding cryolite
in the extraction of aluminium from pure alumina is
(A) to increase the fusion temperature
(B) to decrease the conductivity of alumina
(C) to decrease the conductivity of alumina
(D) none of these
Chapter 5
COAL AND PETROLEUM
Resources present in unlimited quantity in nature and are not
likely to be exhausted by human activities are called
a) Exhaustible
Natural Resources
b) Inexhaustible Natural Resources
c) Exhaustible
Resources
d) None
of the above
Coal, Petroleum and natural gas are examples of
a) Exhaustible Natural Resources
b) Inexhaustible
Natural Resources
c) Expensive
Resources
d) None
of the above
Naphthalene balls used to repel moth and insect is derived from
a) Petroleum
b) Sugar
c) Coal tar
d) LPG
CNG is the abbreviated form of
a) Combined
natural gas
b) Compressed Natural Gas
c) Confirmed
Natural gas
d) Condemned
Natural gas
The slow process of conversion of dead vegetation into coal is
called
a) Carbonisation
b) fuelification
c) Coalification
d) None
of the above
In India petroleum deposit was first found in the state of
a) Gujarat
b) Maharashtra
c) Assam
d) West
Bengal
Use of CNG in automobile is better than petrol because it is
a) Cheaper
b) Less
polluting
c) Cannot
be adulterated
d) All of the above
To reduce fuel consumption in automobile one should
a) Drive
very fast to reach early
b) Not
switch off the engine at traffic lights
c) Not
check tyre pressure regularly
d) Ensure proper maintenance of the vehicle
Black gold is actually
a) Gold
which became black on burning
b) Petroleum
c) Gold
sold in black market
d) Diamond
The earth’s temperature is increasing due to Global warming which
is due to
a) The
Sun giving out more heat
b) The
Earth slowly moving toward the sun
c) Increased use of fossil fuel
d) Less
duration of winter every year
Chapter 6
COMBUSTION AND FLAME
A chemical process in which a substance reacts with oxygen to give
off heat is called
a) Conduction
b) Conjunction
c) Combustion
d) Confusion
Fuel may be
a) Solid
only
b) Solid, Liquid or gas
c) Liquid
only
d) Gas
only
The amount of heat energy produced on complete combustion of_____
fuel is called its calorific value.
a) 1
litre
b) 1 Kg
c) 1
milli litre
d) 1
gram
The substances which have very low ignition temperature and can
easily catch fire with a flame are called
a) Inflammable substances
b) Flaming
substance
c) Fire
proof substance
d) None
of the above
When we heat water in a paper bowl over a candle, the paper does
not catch fire because
a) Paper
is not inflammable
b) Paper
gets wet
c) Due to water the ignition temperature of paper is not reached
d) This
is not possible
When oil or petrol catches fire, water is not used to extinguish
it because
a) Water
covers oil and oil burns under water layer which may not be noticeable
b) Water is heavier than oil / petrol and so remains below the oil
layer which continues to burn
c) Water
get mixed with oil and increases fire
d) Water
gets evaporated
In combustion
a) Both heat and light is produced
b) Only
heat is produced
c) Only
light is produced
d) All
are correct
A person caught fire on clothes is wrapped with blanket because
a) The
person suddenly feels cold
b) To
hide the burnt body parts
c) The
person’s clothes gets burnt
d) To reduce air supply and put fire off
Ignition temperature is
a) The
maximum temperature at which a substance catches fire
b) The minimum temperature at which a substance catches fire
c) The
temperature of burning substance
d) The
temperature in the substance when fire if put off
Explosion takes place because of
a) Release of large amount of gas under pressure due to sudden
reaction
b) Release
of large amount of heat
c) Release
of large amount of light
d) None
of the above
Combustion is a reaction in
which a Substance reacts with-
(a) Hydrogen
(b) Nitrogen
(c) Oxygen
(d) Chlorine
Fuel may be-
(a) Solid
(b) Liquid
(c) Gas
(d) All of these
Which one of the following is
combustible?
(a) Paper
(b) Stone pieces
(c) Glass
(d) Iron nail
Combustion is a
(a) Chemical process
(b) None of the options
(c) Both Chemical process and Physical process
(d) Physical process
Which one of the following is fuel of our body?
(a) Food
(b) Water
(c) Diesel
(d) Petrol
Which one of the following is
fuel of our body?
(a) Petrol
(b) Diesel
(c) Food
(d) Water
Combustion is a-
(a) Physical process
(b) Chemical process
(c) Both (a) & (b)
(d) None of these
Which one of the following is
combustible?
(a) Iron nail
(b) Glass
(c) Stone pieces
(d) Paper
The lowest temperature at which
a Substance catches fire is called its-
(a) Boiling point
(b) Melting point
(c) Ignition temperature
(d) Critical temperature
Which of the following is
inflammable Substances?
(a) Petrol
(b) Wood
(c) Paper
(d) Straw
Essential requirements for
producing fire are:
(a) Fuel
(b) Air
(c) Heat
(d) All of these
Fire extinguisher-
(a) Cut off the supply of air
(b) Bring down the temperature of fuel
(c) Both (a) & (b)
(d) None of these
For combustion ________is necessary
(a) Air
(b) Water
(c) Paper
(d) Fuel
Rapid combustion is
(a) When gas burns, it
produces heat and light
(b) When material suddenly burst into flames
(c) When there is evolution of heat
(d) None of these
Which fuels are used for running
automobiles?
(a) Wood
(b) Coal
(c) Diesel
(d) Charcoal
When magnesium ribbon burnt it produce
(a) Magnesium hydroxide
(b) Magnesium oxide
(c) Magnesium chloride
(d) Magnesium sulphate
Charcoal burns in air producing
(a) CO2
(b) O2
(c) H2
(d) CO
When magnesium ribbon burnt it produce
(a) Magnesium oxide
(b) Magnesium chloride
(c) Magnesium sulphate
(d) Magnesium hydroxide
Which fuels are used for running automobiles?
(a) Diesel
(b) Charcoal
(c) Coal
(d) Wood
Charcoal burns in air producing-
(a) CO2
(b) CO
(c) H2
(d)O2
Explosion is the evolution of
(a) Heat
(b) light
(c) Sound
(d) All of these
Substance which vaporise during
Burning gives
(a) Sound
(b) Flame
(c) Combustion
(d) None of these
Which is the hottest part in the
flame of the candle
(a) Blue
(b) Yellow
(c) Black
(d) Wax part
Innermost zone is the
(a) Hottest part
(b) Moderately hot part
(c) Least hot part
(d) Cold part
Incomplete combustion gives
(a) CO2
(b) CO
(c) Carbon
(d) None of these
Goldsmith uses ____part of the
flame for melting gold
(a) Outermost
(b) Middle
(c) Innermost
(d) Both (b) & (c)
A chemical process in which a
substance reacts with oxygen to give off heat is called
(a) Conduction
(b) Conjunction
(c) Combustion
(d) Confusion
Fuel may be
(a) Solid only
(b) Solid,Liquid or gas
(c) Liquid only
(d) Gas only
The amount of heat energy
produced on complete combustion of_____ fuel is called its calorific value.
(a) 1 litre
(b) 1 Kg
(c) 1 milli litre
(d) 1 gram
The substances which have very
low ignition temperature and can easily catch fire with a flame are called
(a) Inflammable substances
(b) Flaming substance
(c) Fire proof substance
(d) None of the above
When we heat water in a paper
bowl over a candle, the paper does not catch fire because
(a) Paper is not inflamable
(b) Paper gets wet
(c) Due to water the ignition
temperature of paper is not reached
(d) This is not possible
When oil or petrol catches fire,
water is not used to extinguish it because
(a) Water covers oil and oil burns under water layer which may not be
noticeable
(b) Water is heavier than
oil / petrol and so remains below the oil layer which continues to burn
(c) Water get mixed with oil and increases fire
(d) Water gets evaporated
In combustion
(a) Both heat and light is
produced
(b) Only heat is produced
(c) Only light is produced
(d) All are correct
A person caught fire on clothes
is wrapped with blanket because
(a) The person suddenly feels cold
(b) To hide the burnt body parts
(c) The person’s clothes gets burnt
(d) To reduce air supply and
put fire off
Ignition temperature is
(a) The maximum temperature at which a substance catches fire
(b) The minimum temperature
at which a substance catches fire
(c) The temperature of burning substance
(d) The temperature in the substance when fire if put off
Explosion takes place because of
(a) Release of large amount
of gas under pressure due to sudden reaction
(b) Release of large amount of heat
(c) Release of large amount of light
(d) None of the above
There are following zones of a
flame
(a) Three
(b) Two
(c) Four
(d) None of the options
The products of combustion are
(a) Carbon dioxide and water
(b) Oxygen and water
(c) Only carbon dioxide
(d) Only oxygen
Combustion is a
(a) Chemical process
(b) Physical process
(c) Chemical process and physical process
(d) None of the options
Ignition temperature is
(a) Lowest temperature at
catch fire
(b) Higher temperature at catch fire
(c) Any temperature
(d) None of the options
CNG and LPG are the examples of
(a) Gaseous fuels
(b) Solid fuels
(c) Liquid fuels
(d) They are not fuels
The substances which have very low ignition temperature will
(a) Catch fire easily
(b) Will not catch fire
(c) Catch fire after some time
(d) None of the options
Burning of charcoal in a closed room will produce
(a) Carbon monoxide
(b) Carbon dioxide
(c) Nitrogen dioxide
(d) All of these
Coal burns with ______
(a) Only glow
(b) Flame
(c) Flame and only glow
(d) None of the options
Like fuel the sun also provides heat and light. The process taking place in
the sun is called
(a) Nuclear process
(b) Combustion
(c) Burning
(d) All of these
Which substance give heat and light after combustion
(a) Fuel
(b) Flame
(c) Ombustion
(d) None of the options
Which of the following has lower ignition temperature?
(a) Kerosene oil
(b) Vegetable oil
(c) Paper
(d) Wood
The lowest temperature at which a Substance catches fire is called its
(a) Ignition temperature
(b) Critical temperature
(c) Melting point
(d) Boiling point
Fuel may be
(a) All of the options
(b) Gas
(c) Liquid
(d) Solid
Combustion is a reaction in which a Substance reacts with
(a) Oxygen
(b) Chlorine
(c) Nitrogen
(d) Hydrogen
Which is the hottest part in the
flame of the candle
a) Blue
b) Wax part
c) Black
d) Yellow
lue
Substance which vaporise during
Burning gives
a) Flame
b) None of the options
c) Combustion
d) Sound
Answer: Flame
Explosion is the evolution of
a) All of the options
b) Sound
c) Light
d) Heat
ll of the options
Rapid combustion is
a) When gas burns, it produces heat and light
b) None of the options
c) When there is evolution of heat
d) When material suddenly burst into flames
Answer: When gas burns, it
produces heat and light
For combustion______ is
necessary
a) Air
b) Fuel
c) Paper
d) Water
Fire extinguisher-
a) Both Bring down the temperature of fuel and Cut off the supply of
air
b) None of the options
c) Bring down the temperature of fuel
d) Cut off the supply of air
Essential requirements for
producing fire are
a) All of the options
b) Heat
c) Air
d) Fuel
Which of the following is
inflammable Substances?
a) Petrol
b) Straw
c) Paper
d) Wood
In the presence of water,
ignition Temperature of paper is
a) Decrease
b) None of the options
c) Remain constant
d) Increase
Which one of the following is
non Combustible?
a) Stone piece
b) Matchsticks
c) Straw
d) Paper
Calorific value gives the
a) Fuel efficiency
b) None of the options
c) Amount of light
d) Amount of heat
Ideal fuel has______calorific
value
a) High
b) Zero
c) Moderate
d) Low
The most common fire
extinguisher is
a) Water
b) Hydrogen
c) Oxygen
d) CO2
During the process of
combustion______is given out
a) Both heat & light
b) Sound
c) Light
d) Heat
Use of______in vehicle reduces
pollution
a) CNG
b) None of the options
c) Diesel
d) Petrol
Which is better domestic fuel
a) LPG
b) Coal
c) Wood
d) CNG
On burning fuel
produces______amount of heat
a) Large
b) No heat
c) Very less
d) Less
Good fuel is
a) All of the options
b) Burn easily in air
c) Cheap
d) Readily available
Yellow colour in the flame
denotes
a) Middle zone
b) None of the options
c) Innermost zone
d) Outermost part
Innermost zone is the
a) Least hot part
b) Cold part
c) Moderately hot part
d) Hottest part
Burning of coal and diesel
releases
a) SO2
b) CO
c) CO2
d) NO2
Global warming is caused due
to______concentration of Co2 in air
a) Increased
b) None of the options
c) Both Increased and Decreased
d) Decreased
Combustion of most fuels
releases
a) CO2
b) Oxygen
c) NO2
d) SO2
Which of the following is/are
carbon fuel
a) All of the options
b) Petroleum
c) Coal
d) Wood
Element showing spontaneous combustion
is
a) Lithium
b) Copper
c) Phosphorous
d) Calcium
Amount of heat energy produced
on______combustion of 1kg of fuel is Calorific value
a) Complete
b) None of the options
c) Half
d) Incomplete
Goldsmith uses______part of the
flame for melting gold
a) Outermost
b) Innermost, Middle
c) Innermost
d) Middle
Incomplete combustion gives
a) CO
b) None of the options
c) CO2
d) Carbon
Unburnt carbon particles causes
a) Respiratory problems
b) Throat problems
c) Brain infections
d) Stomach infections
Calorific value is measured in
a) Kilo joule per Kg
b) Kilometre
c) Kilograms
d) Kilo joule
Water is not suitable for fire
involving
a) Both Petrol and Oil
b) None of the options
c) Petrol
d) Oil
CO2 is given off by
chemicals like
a) Sodium bicarbonate
b) Sulphuric acid
c) Sodium sulphate
d) Calcium sulphate
CO2 is stored as a liquid
in cylinder at
a) High pressure
b) Low pressure
c) High temperature
d) Low temperature
Best extinguisher for
inflammable Materials is
a) CO2
b) CO
c) SO2
d) Water
When the match struck against
rubbing surface, red phosphorous
a) Converts into white phosphorous
b) Reacts with potassium chlorate
c) None of the options
d) Ignite antimony trisulphide
The head of the safety match
contains
a) Both Potassium Chlorate and Antimony trisulphide
b) None of the options
c) Potassium Chlorate
d) Antimony trisulphide
In the sun, heat and light are
produced by
a) Nuclear reactions
b) None of the options
c) Ionic reactions
d) Chemical reactions
Which is a solid fuel?
a) Wax
b) Wood
c) Diesel
d) Petrol
Acid rain is caused by oxides of
a) Sulphur, Nitrogen
b) Sulphur, Carbon
c) Phosphorous, Carbon
d) Carbon, Nitrogen
Petrol engine gives off gaseous
oxides of
a) Nitrogen
b) Carbon
c) Phosphorous
d) Sulphur
Water is not suitable for fire
involving
a) Petrol and Oil
b) Petrol
c) Oil
d) None of the options
CO2 is given off by chemicals
like
a) Sodium bicarbonate
b) Calcium sulphate
c) Sulphuric acid
d) Sodium sulphate
CO2 is stored as a liquid
in cylinder at
a) High pressure
b) Low pressure
c) High temperature
d) Low temperature
Best extinguisher for
inflammable Materials is
a) CO2
b) SO2
c) Water
d) CO
When the match struck against
rubbing surface, red phosphorous
a) Converts into white phosphorous
b) Reacts with potassium chlorate
c) Ignite antimony trisulphide
d) None of the options
The head of the safety match
contains
a) Potassium Chlorate and Antimony trisulphide
b) Potassium Chlorate
c) None of the options
d) Antimony trisulphide
In the sun, heat and light are
produced by
a) Nuclear reactions
b) Chemical reactions
c) Ionic reactions
d) None of the options
Which is a solid fuel
a) Wax
b) Wood
c) Diesel
d) Petrol
Acid rain is caused by oxides of
a) Sulphur, Nitrogen
b) Sulphur, Carbon
c) Phosphorous, Carbon
d) Carbon, Nitrogen
Petrol engine gives off gaseous
oxides of
a) Nitrogen
b) Sulphur
c) Phosphorous
d) Carbon
Burning of coal and diesel
releases
a) SO2
b) CO
c) CO2
d) NO2
Global warming is caused due
to______concentration of Co2 in air
a) Increased
b) Decreased
c) Increased and Decreased
d) None of the options
Combustion of most fuels
releases
a) CO2
b) NO2
c) SO2
d) Oxygen
Which of the following is/are
carbon fuel
a) All of the options
b) Petroleum
c) Wood
d) Coal
Element showing spontaneous
combustion is
a) Lithium
b) Phosphorous
c) Calcium
d) Copper
Amount of heat energy produced
on _____combustion of 1kg of fuel is Calorific value
a) Complete
b) Half
c) None of the options
d) Incomplete
Goldsmith uses ____part of the
flame for melting gold
a) Outermost
b) Innermost and Middle
c) Innermost
d) Middle
Incomplete combustion gives
a) CO
b) Carbon
c) CO2
d) None of the options
Unburnt carbon particles causes
a) Respiratory problems
b) Stomach infections
c) Brain infections
d) Throat problems
Calorific value is measured in
a) Kilo joule per Kg
b) Kilograms
c) Kilo joule
d) Kilometre
Calorific value gives the
a) Fuel efficiency
b) Amount of heat
c) Amount of light
d) None of the options
Ideal fuel has ____ calorific
value
a) High
b) Moderate
c) Low
d) Zero
The most common fire
extinguisher is
a) Water
b) CO2
c) Oxygen
d) Hydrogen
During the process of combustion
________is given out
a) Both heat & light
b) Sound
c) Light
d) Heat
Use of___ in vehicle reduces
pollution
a) CNG
b) Diesel
c) None of the options
d) Petrol
Which is better domestic fuel
a) LPG
b) CNG
c) Wood
d) Coal
On burning fuel
produces______amount of heat
a) Large
b) Less
c) Very less
d) No heat
Good fuel is
a) All of the options
b) Burn easily in air
c) Cheap
d) Readily available
Yellow colour in the flame
denotes
a) Middle zone
b) Innermost zone
c) Outermost part
d) None of the options
Innermost zone is the
a) Least hot part
b) Moderately hot part
c) Hottest part
d) Cold part
Which is the hottest part in the
flame of the candle
a) Blue
b) Yellow
c) Black
d) Wax part
Substance which vaporise during
Burning gives
a) Flame
b) Sound
c) Combustion
d) None of the options
Explosion is the evolution of
a) All of the options
b) Heat
c) Sound
d) Light
Rapid combustion is
a) When gas burns, it produces heat and light
b) When there is evolution of heat
c) When material suddenly burst into flames
d) None of the options
For combustion ________is
necessary
a) Air
b) Paper
c) Water
d) Fuel
Fire extinguisher
a) Bring down the temperature of fuel and Cut off the supply of air
b) Bring down the temperature of fuel
c) Cut off the supply of air
d) None of the options
Essential requirements for
producing fire are
a) All of the options
b) Heat
c) Fuel
d) Air
Which of the following is
inflammable Substances?
a) Petrol
b) Wood
c) Paper
d) Straw
In the presence of water,
ignition Temperature of paper is-
a) Decrease
b) Remain constant
c) Increase
d) None of the options
Which one of the following is
non Combustible?
a) Stone piece
b) Straw
c) Matchsticks
d) Paper
Which of the following has lower
ignition temperature?
a) Kerosene oil
b) Vegetable oil
c) Wood
d) Paper
The lowest temperature at which
a Substance catches fire is called its-
a) Ignition temperature
b) Melting point
c) Critical temperature
d) Boiling point
Which one of the following is
combustible?
a) Paper
b) Stone pieces
c) Glass
d) Iron nail
Combustion is a
a) Chemical process
b) Physical process
c) Chemical process and Physical process
d) None of the options
Which one of the following is
fuel of our body?
a) Food
b) Diesel
c) Petrol
d) Water
Fuel may be
a) All of the options
b) Gas
c) Liquid
d) Solid
Combustion is a reaction in
which a Substance reacts with-
a) Oxygen
b) Chlorine
c) Nitrogen
d) Hydrogen
Charcoal burns in air producing
a) CO2
b) CO
c) H2
d) O2
When magnesium ribbon burnt it
produce
a) Magnesium oxide
b) Magnesium hydroxide
c) Magnesium chloride
d) Magnesium sulphate
Which fuels are used for running
automobiles?
a) Diesel
b) Wood
c) Coal
d) Charcoal
Chapter 7
CONSERVATION OF PLANTS AND
ANIMALS
Deforestation means
a) Planting
more trees
b) Designing
a forest
c) Demanding
a forest
d) Clearing of forests and using that land for other purposes.
Ill effect of deforestation is it
a) Increases
temperature of earth
b) Increases
pollution level
c) Increases
CO2 level of atmosphere
d) All of the above
Increased level of carbon dioxide in the atmosphere traps the heat
rays reflected by the earth causing an increase in the temperature on the
earth. This is
a) Local
warming
b) House
warming
c) Global warming
d) Country
warming
Part of the earth which supports life where living beings exists
is called ____
a) Atmosphere
b) Biosphere
c) Biology
d) Biodiversity
Variety of organisms existing on the earth, their
interrelationships and their relationship with the environment is called
a) Diversity
b) Biosphere
c) Biology
d) Biodiversity
Species of plants and animals which are found exclusively in a
particular area are called
a) Endemic species
b) Exotic
species
c) Local
species
d) Specific
species
Animals whose numbers are reducing to a level that they might face
extinction are
a) Reducing
species
b) Extinction
species
c) Endangered species
d) Dangerous
species
____ is the Source book which keeps a record of all the endangered
animals and plants.
a) Blue
Data book
b) Red Data book
c) Green
data book
d) Black
data Book
Migratory birds fly to far off places in a particular season of
the year because that place becomes
a) Very cold
b) Very
hot
c) People
hunt birds
d) Birds
donot
Reforestation means
a) Planting
trees
b) Restocking of the destroyed forests by planting new trees.
c) Cutting
trees
d) Burning
trees
Deforestation means
a) planting more trees
b) designing a forest
c) Demanding a forest
d) Clearing of forests and
using that land for other purposes.
Ill effect of deforestation is
it
a) Increases temperature of earth
b) Increases pollution level
c) Increases CO2 level of atmosphere
d) All of the above
Increased level of carbon
dioxide in the atmosphere traps the heat rays reflected by the earth causing an
increase in the temperature on the earth. This is
a) Local warming
b) House warming
c) Global warming
d) Country warming
Part of the earth which supports
life where living beings exists is called ____
a) Atmosphere
b) Biosphere
c) Biology
d) Biodiversity
Variety of organisms existing on
the earth, their interrelationships and their relationship with the environment
is called
a) Diversity
b) Biosphere
c) Biology
d) Biodiversity
Species of plants and animals
which are found exclusively in a particular area are called
a) Endemic species
b) Exotic species
c) Local species
d) Specific species
Animals whose numbers are
reducing to a level that they might face extinction are
a) Reducing species
b) Extinction species
c) Endangered species
d) Dangerous species
____ is the Source book which
keeps a record of all the endangered animals and plants.
a) Blue Data book
b) Red Data book
c) Green data book
d) Black data Book
Migratory birds fly to far off
places in a particular season of the year because that place becomes
a) Very cold
b) Very hot
c) People hunt birds
d) Birds donot
Reforestation means
a) planting trees
b) restocking of the
destroyed forests by planting new trees.
c) Cutting trees
d) Burning trees
Part of earth which supports the
biodiversity is called
a) Biosphere
b) Sanctuary
c) Ecosystem reserve
d) Biotic community
Sanctuary is a place where
a) Animals are protected
b) Plants are protected
c) Office of forest department
d) None of the options
Project Tiger was launched on
a) On 1 April 1973
b) On 23 May 1973
c) On 21 September 1973
d) On 25 December 1973
The places where animals receive
protection is called
a) Zoo
b) National parks
c) Rock shelters
d) None of the options
Fauna indicates for
a) Animals
b) Plants
c) Both plants and animals
d) None of the options
The growing more and more of
plants is called
a) Afforestaion
b) Deforestation
c) Reforestation
d) None of the options
The species which are at the
verge of the extinction
a) Endangered
b) Endemic
c) Extinct
d) None of the options
Deforestation takes place by
a) Human activities and only by natural resources
b) Human activities
c) Only by natural resources
d) None of the options
Cutting of trees on large scale
is called
a) Deforestation
b) Reforestation
c) Afforestation
d) None of the options
A place in environment where an
organism lives is ________
a) Habitat
b) Home
c) Resort
d) Reservoir
The growing more and more of
plants is called
(a) Deforestation
(b) Afforestation
(c) Reforestation
(d) None of these
10. Species is a group of
population capable of :
(a) interequilibrium
(b) interfeeding
(c) intercommunication
(d) interbreeding
‘Project Tiger’ was launched in:
(a) 1983
(b) 1973
(c) 1987
(d) 1976
Part of earth which supports the
biodiversity is called
(a) Biosphere
(b) Sanctuary
(c) Ecosystem reserve
(d) Biotic community
Environment in which an animal
lives is called its:
(a) habitat
(b) home
(c) reservoir
(d) resort
Wildlife is depleting due to:
(a) soil erosion
(b) hunting and poaching
(c) loss of sunlight
(d) loss of minerals
The species which are at the
verge of the extinction are called:
(a) Endemic
(b) Extinct
(c) Endangered
(d) None of these
Different species are classified
into different threat categories in the:
(a) yellow data book
(b) black data book
(c) blue data book
(d) red data book
National parks are:
(a) reserves which are large
and diverse enough to protect whole sets of ecosystems
(b) places where animals are protected in artificial setting instead of their
natural habitat
(c) some areas where wild animals are protected and preserved
(d) none of these
Species which are restricted
only to a specific area and not in any other geographical area are called:
(a) extinct
(b) endangered
(c) endemic
(d) none of these
Chapter 8
CELL- STRUCTURE AND FUNCTIONS
Hen’s egg is
a) An
organ
b) A Single cell
c) A
tissue
d) none
of the above
Projections of different lengths protruding out of the body of
Amoeba is called
a) Walking
legs
b) Legs
c) Pseudopodia
d) Needle
Which of the following cells can change its shape
a) White blood cell
b) Egg
cell
c) Red
blood cell
d) All
of the above
One millionth of a metre is
a) Millimetre
b) Micrometre
c) Nanometre
d) Centimetre
Which of the following combinations are present in plant cell but
not in animal cell
a) Cell Wall & Plastid
b) Cell
wall and Cell membrane
c) Plastid
and Nucleus
d) Cell
Membrane and Cytoplasm
Nucleus is separated from cytoplasm by
a) Protoplasm
b) Cell
membrane
c) Cell
Wall
d) Nuclear membrane
Robert Hooke first observed
a) Nucleus
b) Cells
c) organs
d) virus
A cell without organized nucleus is called
a) Prokaryotic cell
b) Eukaryotic
cell
c) Virus
d) None
of the above
Jelly-like substance present between the cell membrane and the
nucleus is
a) Water
b) Nucleoplasm
c) Cytoplasm
d) oil
Chromosome carry _____ which transfers characters from parents to
offsprings
a) Ribosome
b) Genes
c) Plastid
d) Mitochondria
Hen’s egg is
a) An organ
b) A Single cell
c) A tissue
d) Is none of the above
Projections of different lengths
protruding out of the body of Amoeba is called
a) Walking legs
b) Legs
c) Pseudopodia
d) Needle
Which of the following cells can
change its shape
a) White blood cell
b) Egg cell
c) Red blood cell
d) All of the above
One millionth of a metre is
a) Millimetre
b) Micrometre
c) Nanometre
d) Centimetre
Which of the following
combinations are present in plant cell but not in animal cell
a) Cell Wall & Plastid
b) Cell wall and Cell membrane
c) Plastid and Nucleus
d) Cell Membrane and Cytoplasm
Nucleus is separated from
cytoplasm by
a) Protoplasm
b) Cell membrane
c) Cell Wall
d) Nuclear membrane
Robert Hooke first observed
a) Nucleus
b) Cells
c) organs
d) virus
A cell without organized nucleus
is called
a) Prokaryotic cell
b) Eukaryotic cell
c) Virus
d) None of the above
Jelly-like substance present
between the cell membrane and the nucleus is
a) Water
b) Nucleoplasm
c) Cytoplasm
d) oil
Chromosome carry _____ which
transfers characters from parents to offsprings
a) Ribosome
b) Genes
c) Plastid
d) Mitochondria
Hens egg is a
a) Cell
b) Tissue
c) Organ
d) Organ system
The calls capable of changing
shapes are
a) Amoeba cell and wbc
b) Amoeba cell
c) Wbc
d) None of the options
Cell is discovered by
a) Robert hooke
b) Robert brown
c) John mendal
d) Charse darwin
Tissue is a
a) Group of cells
b) Group of organs
c) Group of tissues
d) Group of organisms
Single celled organisms are
called
a) Unicellular
b) Multi-cellular
c) Unicellular and multi-cellular
d) None of the options
The control unit of cell is
a) Nucleus
b) Cell wall
c) Cytoplasm
d) All of these
Chloroplast is found in
a) Plant cell only
b) Animal cell only
c) Plant cell only and animal cell only
d) None of the options
The functional unit of life is
called
a) Cell
b) Egg
c) Vacuoles
d) None of the options
The kitchen of the cell is
called
a) Plastids
b) Cell wall
c) Nucleus
d) Vacuoles
The power house of cell is
called
a) Mitochondria
b) Cell wall
c) Ribosomes
d) Nucleus
Centriole is associated with –
(A) DNA synthesis
(B) Reproduction
(C) Spindle formation
(D) Respiration
The cell organelle associated
with cell secretion is
(A) Plastids
(B) Mitochondria
(C) Golgi apparatus
(D) Nucleolus
Which of the following is an
inclusion?
(A) Mitochondrion
(B) Lysosome
(C) Golgi complex
(D) Starch grain
Which of the following would not
be considered part of a cell's cytoplsm?
(A) Ribosome
(B) Nucleus
(C) Mitochondrion
(D) Microtubule
Which of the following is called
the brain of the cell?
(A) Nucleus
(B) Mitochondria
(C) Ribosomes
(D) Plasma membrane
Which one is not a part of
nucleus?
(A) Chromatin
(B) Nucleolus
(C) Centrosome
(D) Nucleoplasm
The common feature amongst
nucleus, chloroplast and mitochondrion is –
(A) DNA
(B) Lamellae
(C) Cristae
(D) All of these
Nucleus is separated from
surrounding cytoplasm by a nuclear envelope which is –
(A) Single and porous
(B) Double and porous
(C) Single and nonporous
(D) Double and nonporous
Nucleoplasm is continuous with
cytoplasm through –
(A) Centriole
(B) Golgi apparatus
(C) Nuclear pores
(D) Endoplasmic reticulum
Nucleolus was discovered by
(A) Fontana
(B) Schleiden
(C) Altmann
(D) Robert Brown
The function of the nucleolus in
the cell is
(A) Secretory
(B) Synthesis of DNA
(C) Synthesis of RNA and ribosomes
(D) None of these
Which of the following phenomena
is commonly referred as 'cell drinking'?
(A) Exocytosis
(B) Pinocytosis
(C) Endocytosis
(D) Phagocytosis
The cell organelle taking part
in photorespiration is:
(A) Glyoxysome
(B) Dictyosome
(C) Peroxisome
(D) Endoplasmic reticulum
Endoplasmic reticulum sometime
contains –
(A) Ribosomes
(B) Lysosomes
(C) Golgi bodies
(D) None of these
Ribosomes are composed of –
(A) 1 subunit
(B) 5 subunits
(C) 2 subunits
(D) 4 subunits
Double membrane is absent in –
(A) Mitochondrion
(B) Chloroplast
(C) Nucleus
(D) Lysosome
Animal cell is limited by–
(A) Plasma membrane
(B) Shell membrane
(C) Cell wall
(D) Basement membrane
The radiant energy of sunlight
is converted to chemical energy and stored as –
(A) AMP
(B) ADP
(C) ATP
(D) APP
Root hair absorbs water from
soil through –
(A) Osmosis
(B) Active transport
(C) Diffusion
(D) Endocytosis
The barrier between the
protoplasm and outer environment in a plant cell is –
(A) Cell membrane
(B) Nuclear membrane
(C) Cell wall
(D) Tonoplast
An animal cell differs from a
plant cell in respect of –
(A) ER
(B) Cell wall
(C) Ribosomes
(D) Cell membrane.
If the nucleus is a cell's
"control centre" and chloroplasts its "solar
collectors". Which of the following might be called the cell's
combination "food processor" and "garbage disposer"?
(A) Lysosome
(B) Ribosome
(C) Golgi apparatus
(D) Nucleolus
The longest cell in human body
is –
(A) Neuron
(B) Muscle fibre
(C) Epithelial cell
(D) Bone cell
Identify human cells which lack
nucleus–
(A) WBC
(B) RBC
(C) Platelets
(D) Nerve cells
The energy currency of a cell is
–
(A) ADP
(B) AMP
(C) ATP
(D) CTP
Which organelle releases oxygen?
(A) Ribosome
(B) Golgi apparatus
(C) Mitochondria
(D) Chloroplast.
The term "protoplasm"
to the living substance present inside the cell, was given by
(A) Robert Hooke
(B) Robert Brown
(C) J.E. Purkinje
(D) W.Flemming
Ribosomes are the centre for –
(A) Respiration
(B) Photosynthesis
(C) Protein synthesis
(D) Fat synthesis.
Lysosomes are the reservoirs of
(A) Fat
(B) RNA
(C) Secretory glycoproteins
(D) Hydrolytic enzymes.
The membrane surrounding the
vacuole of a plant cell is called
(A) Tonoplast
(B) Plasma membrane
(C) Nuclear membrane
(D) Cell wall
Centriole is associated with –
(A) DNA synthesis
(B) Reproduction
(C) Spindle formation
(D) Respiration
The cell organelle associated
with cell secretion is
(A) Plastids
(B) Mitochondria
(C) Golgi apparatus
(D) Nucleolus
Which of the following is an
inclusion?
(A) Mitochondrion
(B) Lysosome
(C) Golgi complex
(D) Starch grain
Which of the following would not
be considered part of a cell's cytoplsm?
(A) Ribosome
(B) Nucleus
(C) Mitochondrion
(D) Microtubule
Which of the following is called
the brain of the cell?
(A) Nucleus
(B) Mitochondria
(C) Ribosomes
(D) Plasma membrane
Which one is not a part of
nucleus?
(A) Chromatin
(B) Nucleolus
(C) Centrosome
(D) Nucleoplasm
The common feature amongst
nucleus, chloroplast and mitochondrion is –
(A) DNA
(B) Lamellae
(C) Cristae
(D) All of these
Nucleus is separated from
surrounding cytoplasm by a nuclear envelope which is –
(A) Single and porous
(B) Double and porous
(C) Single and nonporous
(D) Double and nonporous
Nucleoplasm is continuous with
cytoplasm through –
(A) Centriole
(B) Golgi apparatus
(C) Nuclear pores
(D) Endoplasmic reticulum
Nucleolus was discovered by
(A) Fontana
(B) Schleiden
(C) Altmann
(D) Robert Brown
The function of the nucleolus in
the cell is
(A) Secretory
(B) Synthesis of DNA
(C) Synthesis of RNA and ribosomes
(D) None of these
Which of the following phenomena
is commonly referred as 'cell drinking'?
(A) Exocytosis
(B) Pinocytosis
(C) Endocytosis
(D) Phagocytosis
The cell organelle taking part
in photorespiration is
(A) Glyoxysome
(B) Dictyosome
(C) Peroxisome
(D) Endoplasmic reticulum
Endoplasmic reticulum sometime
contains –
(A) Ribosomes
(B) Lysosomes
(C) Golgi bodies
(D) None of these
Ribosomes are composed of –
(A) 1 subunit
(B) 5 subunits
(C) 2 subunits
(D) 4 subunits
Who is known as father of
microbiology?
(a) Alexander Fleming
(b) Robert Hook
(c) Leeuwenhoek
(d) E. Adams
Cheek Cells Do Not Have:
(a) Cell membrane
(b) Golgi apparatus
(c) Nucleus
(d) Plastids
Identify the statement which is
true for cells.
(a) Cells can be easily seen with naked eyes.
(b) Insect's egg is not a cell.
(c) A single cell can perform all the functions in a unicellular
organism.
(d) The size and shape of cells is uniform in multicellular
organism
Which of the following is
present only in plants:
(a) plasma membrane
(b) cell wall
(c) nucleo membrane
(d) cytoplasm
A cell with a definite nucleus
and nuclear membrane is called as ………….
(a) virus
(b) plant cell
(c) prokaryote
(d) eukaryote
The kitchen of the cell is
called
(a) Cell wall
(b) Nucleus
(c) Vacuoles
(d) Plastids
Single celled organisms are
called
(a) Unicellular
(b) Multi-cellular
(c) Both of these
(d) None of these
Several small coloured bodies in
the cytoplasm of the cells of Tradescantia leaf are called ___.
(a) Organelle
(b) Plastids
(c) Vacuoles
(d) Mitochondria
Which of the following is a
locomotory organelle in protozoa ?
(a) pseudocoelom
(b) tentacles
(c) flagella
(d) all of them
The organelle not present in an
animal cell is:
(a) cell membrane
(b) nucleus
(c) mitochondria
(d) chloroplast
The coloured organelles which
are found in plants only are
(a) chlorophyll
(b) plastids
(c) vacuoles
(d) WBC
Which Of The Following Organelle
Is Not Found In The Root Cells Of A Plant?
(a) Nucleus
(b) Vacuole
(c) Mitochondria
(d) Chloroplasts
Which of the following
statements is/are the functions of golgi apparatus?
(a) Transporting proteins that are to be released from the cell
(b) Packaging proteins into vesicles.
(c) Altering or modifying proteins.
(d) All of these
The basic structural unit of
living organisms is:
(a) cell
(b) tissue
(c) organ
(d) none of these
A group of similar cells
perfonning a specific function is called:
(a) organ
(b) tissue
(c) cell organalle
(d) none of these
Cheek cells are
(A) epithelial cells
(B) epidermal cells
(C) vascular cells
(D) guard cells
The cell wall in plant cells is
made up of
(A) Proteins
(B) Facts
(C) Plasma
(D) Cellulose
Blood is a type of
(A) Epithelial tissue
(B) Connective tissue
(C) Nervous tissue
(D) Muscular tissue
The brain and spinal cord are
made up of
(A) Nervous tissue
(B) Epithelial tissue
(C) Muscular tissue
(D)Connective tissue
Red blood cells
(A) have two nuclei
(B) have a cell wall
(C) have pigment-containing plastids
(D) do not have a nucleus
The covering of an animal cell
is:
(A) Cell wall
(B) Cell membrane
(C) Nuclear membrane
(D) Cytoplasm
Organisms lacking a nucleus and
membrane bound organe cells are called:
(A) Diploid
(B) Haploid
(C) Prokaryotes
(D) Eukaryotes
Relatively large vacuoles are
present in:
(A) all prokaryotes
(B) all eukaryotes
(C) Plant cells
(D) Animal cells
The growth of cells is regulated
by
(A) mitochondrion
(B) vacuole
(C) nucleus
(D) Golgi complex
The centriole is associated
with:
(A) DNA synthesis
(B) cell division
(C) Circulation
(D) respiration
Proteins are formed in the:
(A) Golgi complex
(B) mitochondria
(C) plastids
(D) ribsosomes
The name suicide bag has been
given to:
(A) Centroiles
(B) Ribosome
(C) Mitochondrion
(D) Lysosome
Genes are located on the:
(A) Nuclear membrane
(B) Chromosomes
(C) Lysosomes
(D) Cell membrane
Biological membrane includes
(A) only nuclear membrane
(B) only membranes of Golgi complex
(C) only mitochondrial membrane
(D) all the intracellular membranes along with plasma membrane
Which of the following is the
main difference between onion peel cells and human cheek cells?
(A) Presence of mitochondria in onion peel cells only
(B) presence of cell wall in onion peel cells only
(C) Absence of plasma membrane in cheek cells
(D) Absence of endoplasmic reticulum in cheek cells
Centrioles are found in
(A) onion peel cells
(B) human cheek cells
(C) all plant cells
(D) none of these
The network of tube-like
structure running through the cytoplasm is called
(A) Golgi complex
(B) mitochondria
(C) endoplasmic reticulum
(D) ribosomes
The semipermeable membrane in
the plant cell allows the diffusion of:
(A) solute molecules
(B) solvent molecules
(C) solute and solvent molecules
(D) none of these
Entry of water into root hairs
is an examples of :
(A) diffusion
(B) imbibition
(C) osmosis
(D) plasmolysis
Gaseous exchange in plants takes
place through:
(A) epidermal cells
(B) stomata
(C) stem
(D) vascular tissue
When a cell is placed in strong
salt solution, it shrinks because:
(A) salt solution enters the cell
(B) cytoplasm of the cell begins to decompose
(C) water comes out of the cell to develop equilibrium
(D) all of these
Tissue is defined as:
(A) group of similar cells having a common function
(B) different types of cells performing the same functions
(C) different types of cells performing different functions
(D) organised group of cells performing many functions
Cartilage and bone are type of:
(A) epithelial tissue
(B) skeletal tissue
(C) muscular tissue
(D) nervous tissue
Muscles involved in the movement
of the arm are:
(A) striated
(B) nonstriated
(C) cardiac
(D) smooth
Blood is a type of:
(A) epithelial tissue
(B) nervous tissue
(C) connective tissue
(D) muscular tissue
Which of the following is
selectively permeable?
(a) cell membrane
(b) cell wall
(c) plasmid membrane
(d) capsule
Which Of The Following Are
Prokaryotes?
(a) Protozoa and blue – green algae
(b) Blue – green algae and fungi
(c) Protozoa and bacteria
(d). Blue – green algae and
bacteria
Of The Following Parts Of A Cell
Listed Below, Name The Part That Is Common To Plant Cell, Animal Cell, And A
Bacterial Cell:
(a) Chloroplast
(b) Cell wall
(c) Cell membrane
(d) Nucleus
Vacuoles of plant cells are
(a) permanent
(b) semi-permanent
(c) temporary
(d) impermeable
Cell walls is found in
(a) plant cells only
(b) animal cells only
(c) both (a) and (b)
(d) none of them
A. Fill in the blanks
1. Cell wall is found only in ______ cells.
2. Ribosomes are located on the surface of _____
3. All the components of a cell including the cell membrae is
called _____
4. A true nucleus is absent in bacteria and ______
5. Two types of nucleic acids are ______and ________.
B. True & False type
questions.
6. All living organisms consists of cells.
7. The main function of ribosomes is to synthesize proteins.
8. Plastids are the sites of photosynthesis.
9. Chloroplasts are colourless plastids.
10. Prokaryotic cells lack nuclear envelope.
ANSWER KEY
Fill in the blanks
1. plant
2. endoplasmic reticulum
3. protoplasm
4. BGA (Blue green algae)
5. RNA & DNA
True & False type questions.
6. True
7. True
8. True
9. False
10. True
C. Very short answer type questions.
11. Name the four types of animal tissue
12. What is the importance of ribosomes ?
13. What is the function of mitochondria?
14. Name the following:
(a) structural and function unit of life
(b) powerhouse of the cell
15. Why does the plant cell remain more rigid then the animal
cell?
D. Short answer type questions
16. Why is the plasma membrane called selectively permeable
17. Prokaryotes lack a true nucleus, Explain.
18. What is osmosis?
19. Difine diffusion
20. Why lysosomer are called suicidal bags?
E. Long answer type questions
21. What are the basic differences between plant cells and
animal cells?
22. Describe the ultrastructure of a typical animal cell.
23. Write short notes on the following:
Golgi complex, mitochondria, ribonsomes,nucleus, chromosomes
24. Explain the type of animal tissue.
25. Explain the type of plant tissue.
Power house of the cell is:
(a) nucleus
(b) chloroplast
(c) cytoplasm
(d) mitochondira
Genes are located in
(a) chrpmosomes
(b) plastids
(c) cytoplasm
(d) lysosome
Who discovered cell in 1665?
(a) Robert Hook
(b) Robert Crook
(c) David Thomson
(d) Marie Francois
The life giving substance in a
cell is:
(a) cytoplasm
(b) protoplasm
(c) nucleoplasm
(d) none of these
Hen’s egg is a
(a) Tissue
(b) Organ
(c) Organ system
(d) cell
The Jelly-Like Fluid Substance
Present In Cells Is Called:
(a) Protoplasm
(b) Chromosome
(c) Chloroplast
(d) Cytoplasm
Lysosomes are the
(a) digestive centres
(b) respiratory centres
(c) excretory centres
(d) energy centres
A suitable term for the various
components of cells is
(a) Tissue
(b) Cell organelles
(c) Chromosomes
(d) Genes
Blue-green Algae are:
(a) Prokaryotes
(b) Eukaryotes
(c) Both (a) and (b)
(d) Neither a) nor (b)
Genes are located in
(a) chromosomes
(b) plastids
(c) cytoplasm
(d) lysosome
Tissues combine to form
(a) nucleus
(b) cells
(c) organism
(d) organs
Chromosomes are found in
(a) nucleus
(b) nucleolus
(c) nucleoplast
(d) vacuole
The percentage amount of
integral protein of plasma membrane is
(a) 40%
(b) 50%
(c) 60%
(d) 70%
Which of the following given
below is in the ascending order of the number of nuclei present in cells?
(a) Paramoecium, brain cell, RBC of mammals.
(b) RBC of mammals, brain cell, paramoecium.
(c) Brain cell, RBC of mammals, paramoecium.
(d) All of these
The outermost layer of plant
cell is:
(a) cell wall
(b) cell membrane
(c) nuclear membrane
(d) none of these
Cells present in living organism
differ in
(a) numbers
(b) shape
(c) size
(d) all of these
Which structure makes the outer
boundary of an animal cell?
(a) Cell wall
(b) Cell membrane
(c) Nuclear membrane
(d) Cytoplasm
Cells which lack nuclear
membrane are
(a) eukaryotic cells
(b) prokaryotic cells
(c) single cells
(d) multicells
The other name of cell membrane
is
(a) plasma membrane
(b) cell wall
(c) nuclear membrane
(d) none of these
The white part of egg is called:
(a) yolk
(b) albumen
(c) cytoplasm
(d) none of these
Which of the following is called
the functional unit of life?
(a) Cell
(b) Egg
(c) Nucleus
(d) None of these
The liquid material in the
nucleus is
(a) chromosomes
(b) bacteria
(c) nucleoplasm
(d) nucleolus
The control centre of all the activities
of a cell is
(a) nucleus
(b) nucleoplasm
(c) cytoplasm
(d) organelles
The basic structural unit of
living organisms is:
(a) cell
(b) tissue
(c) organ
(d) none of these
Yolk is:
(a) small part of cell
(b) yellow part of egg
(c) white part of egg
(d) none of these
Largest cell visible to uniaded
eye is:
(a) hen’s egg
(b) ostrich egg
(c) bactería cell
(d) nerve cell
Chapter 9
REPRODUCTION IN ANIMALS
Human Male germ cell is
a) zygote
b) ovum
c) testis
d) sperm
Every month ____ mature egg(s) can be released from human ovary
a) 1
b) 2
c) 3
d) 4
Internal fertilization does not occur in
a) human
b) dog
c) fish
d) cow
Fertilization results into formation of
a) egg
b) zygote
c) sperm
d) individual
Which one is not an oviparous animal?
a) human
b) crow
c) hen
d) crocodile
The transformation of the larva into an adult through drastic
changes is called
a) Metaphase
b) Metastasis
c) Meteorite
d) Metamorphosis
In asexual reproduction involves _______
a) Two
parents
b) Four
parents
c) One parent
d) No
parents
Dolly the famous animal was a
a) donkey
b) girl
c) Cloned sheep
d) Normal
sheep
During a cell division
a) Nucleus divides first and then cytoplasm
b) Cytoplasm
divides first and then Nucleus
c) Nucleus
and cytoplasm divides together
d) No such
relationship
Budding is found in
a) Yeast
b) Hydra and Yeast
c) Hydra
d) None
Human Male germ cell is
a) zygote
b) ovum
c) testis
d) sperm
Every month ____ mature egg(s) can be released from human ovary
a) 1
b) 2
c) 3
d) 4
Internal fertilization does not occur in
a) human
b) dog
c) fish
d) cow
Fertilization results into formation of
a) egg
b) zygote
c) sperm
d) individual
Which one is not an oviparous animal?
a) human
b) crow
c) hen
d) crocodile
The transformation of the larva into an adult through drastic
changes is called
a) Metaphase
b) Metastasis
c) Meteorite
d) Metamorphosis
In asexual reproduction involves _______
a) Two parents
b) Four parents
c) One parent
d) No parents
Dolly the famous animal was a
a) donkey
b) girl
c) Cloned sheep
d) Normal sheep
During a cell division
a) Nucleus divides first and
then cytoplasm
b) Cytoplasm divides first and then Nucleus
c) Nucleus and cytoplasm divides together
d) No such relationship
Budding is found in
a) Yeast
b) Hydra and Yeast
c) Hydra
d) None
Cloning is a mode of
a)
Asexual production
b)
Sexual production
c)
Sexual production and asexual production
d)
None of the options
Viviparous organisms are the ones which
a)
Produce young ones
b)
Produce eggs
c)
Produce eggs and produce young ones
d)
None of the options
Foetus is the
a) Well
developed embryo
b)
Developing embryo
c) A
zygote
d)
Male gamete
A sperm consists of
a)
Three parts
b)
One part
c)
Two parts
d)
Four parts
How many modes of reproduction are there in animals?
a) Two
types
b)
One type
c)
Three types
d)
Four types
Egg are formed in the
a)
Ovary
b)
Testes
c)
Penis
d)
None of the options
The cell formed after fertisation is called
a)
Zygote
b)
Foetus
c)
Embryo
d)
None of the options
Where does the fusion of male and female gametes generally take
place?
a)
Fallopian tube
b)
Ovary
c)
Uterus
d)
Zygote
Tadpole is
the developing stage of which of these
a)
Frogs
b)
Dogs
c)
Cats
d)
Humans
The animals that produce new young ones are known as
a)
Viviparous
b)
Oviparous
c)
Oviparous and viviparous
d)
None of the options
Where does the fusion of male and female gametes generally take
place?
(a) Fallopian tube
(b) Ovary
(c) Uterus
(d) Zygote
Which of the following are male reproductive organs:
(a) ovary, testis, scrotum, penis
(b) ovary, uterus, testis, scrotum
(c) uterus, testis, scrotum, penis
(d) urinary bladder, testis,
scrotum, penis.
Animals in which male and female are distinct are called :
(a) bisexual
(b) unisexual
(c) sexual
(d) none of these
A fertihsed ovum deirelops into a baby in the:
(a) vagina
(b) fallopian tubes
(c) uterus
(d) ovary
Which is not a viviparous animal?
(a) Human being
(b) Cow
(c) Dog
(d) Butterfly
Test tube babies grow in:
(a) mother’s uterus
(b) mother’s oviduct
(c) none of these
(d) test tubes
Viviparous organisms are the ones which
(a) Produce eggs
(b) Produce young ones
(c) Both I and II
(d) None of these
The developing zygote is called:
(a) baby
(b) foetus
(c) embryo
(d) none of these
The process leading to the fusion of the gametes in plants and
inimals is called:
(a) grbwth
(b) fertihsation
(c) development
(d) fusion
Internal fertilization occurs:
(a) in female body
(b) outside female body
(c) in male body
(d) outside male body
Chapter 10
REACHING THE AGE OF ADOLESCENCE
The period of life, when the body undergoes changes, leading to
reproductive maturity, is called
a) childhood
b) adolescence
c) Grown
up
d) Old
age
The human body undergoes several changes during adolescence. These
changes mark the onset of
a) Puberty
b) Prematurity
c) Post
adolescence
d) ageing
Adam’s apple is prominent in
a) Boys
of any age
b) Adolescent
girls
c) Girls
of any age
d) Adolescent boys
Larynx is also called
a) Voice box
b) Sound
box
c) Black
box
d) All
of the above
Acne and pimples on the face is due to secretion of
a) bile
from liver
b) Oil glands during puberty
c) Enzymes
in the digestive tract
d) Tear
from tear glands
Testosterone is a hormone found in human ___
a) Children
b) males
and females
c) Females
only
d) Males only
The first menstrual flow is called
a) Menstruation
b) Mensuration
c) Menarche
d) Menopause
Menopause occurs at the age of
a) 10-12
years in boys
b) 45-50
years in men
c) 10-12
years in girls
d) 45-50 years in women
When a sperm containing Y chromosome fertilizes an egg with X
chromosome, the zygote develops into a _____ child
a) Female
b) Either
a male or female
c) Male
d) No
child
The change from larvae to adult is called
a) Metabolism
b) Metamorphosis
c) Metastasis
d) Morphology
Chapter 11
FORCE AND PRESSURE
A push or pull on an object is called
a) Pressure
b) Push-pull
c) Force
d) All
of the above
If two forces act in the opposite directions on an object, the net
force acting on it is the
a) Sum
of the two forces
b) difference between the two forces
c) Multiplication
of the two forces
d) Division
of the two forces
Which of the following is proper example(s) to explain that force
on an object may change its shape
a) A
ball of dough rolled into chapati
b) Pressing
a rubber ball kept on table
c) Making
model using clay
d) All of the above
A ball rolling on the ground slows down and finally stops. This is
because of
a) Force
b) Less
force applied
c) Friction
d) None
of the above
Force of friction always acts on moving objects and its direction
shall be ____
a) On
any direction
b) Along
the direction of motion
c) Perpendicular
to the direction of motion
d) Opposite to the direction of motion
If In a tug-o-war, when two teams are pulling a rope, and the rope
does not move towards any team, it implies that
a) Equal
force is being applied in the same direction
b) Equal Force is being applied in opposite direction
c) No
force is applied in any direction
d) Cannot
be explained
An example of a non- contact force is
a) Force
exerted by us to lift a bucket
b) Push
a stationary car
c) Force exerted by magnet
d) Hit a
cricket ball for a 6 run
Pressure =
a) Area
/ force on which it acts
b) force / area on which it acts
c) Volume
/ force on which it acts
d) Force
/ volume on which it acts
Gravity is
a) Repulsive
b) Attraction
+ Repulsive force
c) Attractive force
d) Not a
force
A batsman hits the ball for a boundary past the bowler i.e. four
runs. The batsman thus
a) Changes the direction & speed of the ball
b) Does
not change the direction but speed only
c) Does
not change the speed but direction only
d) Does
not change either direction or speed
The period of life, when the
body undergoes changes, leading to reproductive maturity, is called
a) childhood
b) adolescence
c) Grown up
d) Old age
The human body undergoes several
changes during adolescence. These changes mark the onset of
a) Puberty
b) Prematurity
c) Post adolescence
d) ageing
Adam’s apple is prominent in
a) Boys of any age
b) Adolescent girls
c) Girls of any age
d) Adolescent boys
Larynx is also called
a) Voice box
b) Sound box
c) Black box
d) All of the above
Acne and pimples on the face is
due to secretion of
a) bile from liver
b) Oil glands during puberty
c) Enzymes in the digestive tract
d) Tear from tear glands
Testosterone is a hormone found
in human ___
a) Children
b) males and females
c) Females only
d) Males only
The first menstrual flow is
called
a) Menstruation
b) Mensuration
c) Menarche
d) Menopause
8 Menopause occurs at the
age of
a) 10-12 years in boys
b) 45-50 years in men
c) 10-12 years in girls
d) 45-50 years in women
When a sperm containing Y
chromosome fertilizes an egg with X chromosome, the zygote develops into a
_____ child
a) Female
b) Either a male or female
c) Male
d) No child
The change from larvae to adult
is called
a) Metabolism
b) Metamorphosis
c) Metastasis
d) Morphology
The male hormone is
a)
Testosterone
b)
Estragon
c)
Projestrone
d)
All of these
The number of chromosomes are
present in human cell.
a) 23
pairs
b)
22 pairs
c)
24 pairs
d)
24 pairs
Puberty age in females is
a) 10 -
12 years
b)
12 - 14 years
c)
8 - 10 years
d)
More than 14 years
Fertilisation is called
a)
Fusion of sperms and eggs
b)
To produce sperm
c)
To produce eggs
d)
All of these
The period of maturity of
reproductive organs is called.
a)
Adolescene period
b)
Mensuration
c)
Gestation period
d)
None of the options
Initially girls grow _____ than
boys.
a)
Faster
b)
Slower
c)
Faster and slower
d)
None of the options
There are__ __ pairs of
chromosome in human cell.
a) 23
b)
46
c)
22
d)
All are wrong
Thyroxin produced by
a)
Thyroid gland
b)
Pituitary gland
c)
Adrenal gland
d)
Testes
The egg is
a)
Female gamete
b)
Egg gamete
c)
Egg gamete and female gamete
d)
None of the options
Larynx is called
a)
Voice box
b)
Music box
c)
Respiratory organ
d)
None of the options
There are__ __ pairs of
chromosome in human cell.
(a) 23
(b) 46
(c) 22
(d) All are wrong
Which of the following hormones
is secreted by pituitary gland:
(a) insulin
(b) thyroxine
(c) growth
(d) adrenalin
Progesterone level falls during
(a) Menopause
(b) Lactation
(c) Gestation
(d) Menstruation
Which one is another terms for
teenage is
(a) Maturity
(b) Puberty
(c) Adolescence
(d) Thyroid
Which or ht ronowing proIdes
iron to our body:
(a) leafy vegetabks
(b) citrus
(c) meat
(d) all of these
The male hormone is
(a) Estragon
(b) Projestrone
(c) Testosterone
(d) All of these
Which of the following will
occur in females at puberty?
(a) Ovulation
(b) Enlargement of breasts
(c) Broadening of hips
(d) All of these
In girls, secondary sexual
characteristics develop between
(a) 9 and 11 years.
(b) 11 and 14 years.
(c) 15 and 18 years.
(d) 19 and 21 years.
Hormones reaches to different
parts:
(a) with lymph
(b) by ducts
(c) with blood
(d) none of these
Which chromosomes determine the
sex of an individual?
(a) Autosomes
(b) Allosomes
(c) Plasmid
(d) Giant chromosomes
Chapter 12
FRICTION
It is difficult to walk on an oily floor because
a) Floor
gets spoiled
b) There
is more resistance
c) Force
of friction is high
d) Force of friction is very less
Spring balance is a device used for measuring the _____________
acting on an object.
a) mass
b) pressure
c) force
d)
None of the above
A matchstick struck on a matchbox catches fire easily because
a) Friction may cause fire
b) Of
chemical reaction
c) Force
heated the match stick
d) None
of the above
Tyres are treaded to
a) look
good
b) Increase friction
c) increase
its longivity
d) increase
weight of the tyre
Lubricants are substances which
a) Increase
friction
b) Are
used to light fire
c) Reduce friction
d) Are
used to put out a fire
Sliding friction is _________ than / to rolling friction
a) smaller
b) greater
c) equal
d) None
of the above
The frictional force exerted by fluids is also called ______
a) drug
b) drag
c) drop
d) drown
Four children were asked to arrange forces due to rolling, static
and sliding frictions in an increasing order. Their arrangements are given below.
Choose the correct arrangement.
a) Rolling,
Static, Sliding
b) Static,
Rolling, Sliding
c) Rolling, sliding, static
d) Sliding,
Static, Rolling
A boat or an aeroplane has a pointed or tapering front / head.
Why?
a) To
increase the friction of fluid
b) To reduce the friction of fluid
c) To
look good
d) For
no reason
The sole of the shoes becomes plain after wearing it for several
months. The reason is
a) Wearing out due to friction
b) Wearing
out due to no friction
c) Sole
is of bad quality
d) None of
the above
It is difficult to walk on an
oily floor because
a) Floor gets spoiled
b) There is more resistance
c) Force of friction is high
d) Force of friction is very
less
Spring balance is a device used
for measuring the _____________ acting on an object.
a) mass
b) pressure
c) force
d) None of the above
A matchstick struck on a
matchbox catches fire easily because
a) Friction may cause
fire
b) Of chemical reaction
c) Force heated the match stick
d) None of the above
Tyres are treaded to
a) look good
b) Increase friction
c) increase its longivity
d) increase weight of the tyre
Lubricants are substances which
a) Increase friction
b) Are used to light fire
c) Reduce friction
d) Are used to put out a fire
Sliding friction is _________
than / to rolling friction
a) smaller
b) greater
c) equal
d) None of the above
The frictional force exerted by
fluids is also called ______
a) drug
b) drag
c) drop
d) drown
Four children were asked to
arrange forces due to rolling, static and sliding frictions in an increasing
order. Their arrangements are given below. Choose the correct arrangement.
a) Rolling, Static, Sliding
b) Static, Rolling, Sliding
c) Rolling, sliding, static
d) Sliding, Static, Rolling
A boat or an aeroplane has a
pointed or tapering front / head. Why?
a) To increase the friction of fluid
b) To reduce the friction of fluid
c) To look good
d) For no reason
The sole of the shoes becomes
plain after wearing it for several months. The reason is
a) Wearing out due to friction
b) Wearing out due to no friction
c) Sole is of bad quality
d) None of the above
The shape of the airplane is
like a
a) Bird
b) Car
c) Dog
d) All
Rolling friction is smaller
than?
a) All of these
b) Sliding friction
c) Static friction
d) Fluid friction
Lubricants ________
a) Reduce friction
b) Increase friction
c) Increase friction and reduce friction
d) None of the options
Friction is a /an_______
a) Evil and foe
b) Evil
c) Foe
d) None of the options
On what force of friction
depends?
a) All of these
b) Smoothness of surface
c) Roughness of surface
d) Inclination of surface
Fluid are____
a) Gases and liquids both
b) Gases
c) Liquids
d) None of the options
What kind of substances are
known as lubricants
a) Decrease friction
b) Increase friction
c) Increase or decrease friction
d) None of the options
Friction is a __________
a) Contact force
b) Non-contact force
c) Magnetic force
d) None of the options
Which one of these
characteristics does a smooth surface has?
a) Less frictional force
b) More frictional force
c) Sometimes less and sometimes more force
d) All of these
Complete the sentence. Friction
always ____________
a) Opposes the motion
b) Helps the motion
c) Helps the motion and opposes the motion
d) None of the options
Ball-bearings are used to
convert static friction into:
(a) drag
(b) sliding friction
(c) rolling friction
(d) none of these
Which one of these
characteristics does a smooth surface has?
(a) Less frictional force
(b) More frictional force
(c) Sometimes less and sometimes more force
(d) All of above
Lubricants ________
(a) Increase friction
(b) Reduce friction
(c) Both (a) and (b)
(d) None
Smooth surface has
(a) less frictional force
(b) more frictional force
(c) sometimes less and sometimes more force
(d) all the above
Which Of The Following Is Not An
Advantage Of Fiction?
(a) It enables drawing to be made on paper
(b) It enables fallen things to be picked up
(c) It enables rubber pads
to be rubbed off
(d) It enables vehicles to move on ground
A Toy Car Released With The Same
Initial Speed Will Travel Farthest On:
(a) Muddy
(b) Polished marble surface
(c) Cemented surface
(d) Brick surface
What type of a force is
friction?
(a) Contact force
(b) Non-contact force
(c) Electrostatic force
(d) Magnetic force
Which Of The Following Will
Produce The Maximum Friction?
(a) Rubbing of sand paper on glazed paper
(b) Rubbing of sand paper on glass table top
(c) Rubbing of sand paper on aluminium frame
(d) Rubbing of sand paper on
sand paper
Which of the following is
characteristic of friction?
(a) It is a non-contact force
(b) It works on only resting body
(c) It works opposite to
direction of motion
(d) It can change the direction of motion
Friction the rehuye motion
between Io surfaces In contact.
(a) favours
(b) opposes
(c) is
(d) none of these
Chapter 13
SOUND
Sound is produced by
a) Non-Vibrating
objects only
b) Vibrating
and non- vibrating objects
c) Vibration
has no relation to sound
d) Vibrating objects only
Sound cannot travel through
a) vacuum
b) air
c) water
d) solids
Vibration is also known as
a) Vibratory
motion
b) Translatory
motion
c) Oscillatory motion
d) None
of these
Frequency is expressed in
a) Kilometer
b) Hertz
c) gram
d) Degree
centigrade
The number of oscillations per second is called
a) Amplitude
of oscillation
b) Pitch
of oscillation
c) Frequency of oscillation
d) None
of the above
Above _____ dB the sound becomes physically painful
a) 60
b) 40
c) 120
d) 80
When the amplitude of vibration is large, sound produced is
a) No
sound
b) feeble
c) loud
d) No
relation between amplitude and sound
Human can hear sound in the range of
a) 200-2000
Hz
b) 20-20,000 Hz
c) 2-20000
Hz
d) 2000-200000
Hz
An ultrasound equipment works at frequency
a) Higher than 20,000 Hz
b) Higher
than 10,000 Hz
c) Lower
than 20,000 Hz
d) Lower
than 10,000 Hz
Voice of man is heavy compared to a woman because
a) Female
vocal cord is longer
b) Male
vocal cord is shorter
c) Male vocal cord is longer
d) The
concept is not related
Sound is
produced by
a) Non-Vibrating objects only
b) Vibrating and non- vibrating objects
c) Vibration has no relation to sound
d) Vibrating objects only
Sound cannot travel through
a) vacuum
b) air
c) water
d) solids
Vibration is also known as
a) Vibratory motion
b) Translatory motion
c) Oscillatory motion
d) None of these
Frequency is expressed in
a) Kilometer
b) Hertz
c) gram
d) Degree centigrade
The number of oscillations per
second is called
a) Amplitude of oscillation
b) Pitch of oscillation
c) Frequency of oscillation
d) None of the above
Above _____ dB the sound becomes
physically painful
a) 60
b) 40
c) 120
d) 80
When the amplitude of vibration
is large, sound produced is
a) No sound
b) feeble
c) loud
d) No relation between amplitude and sound
Human can hear sound in the
range of
a) 200-2000 Hz
b) 20-20,000 Hz
c) 2-20000 Hz
d) 2000-200000 Hz
An ultrasound equipment works at
frequency
a) Higher than 20,000 Hz
b) Higher than 10,000 Hz
c) Lower than 20,000 Hz
d) Lower than 10,000 Hz
Voice of man is heavy compared
to a woman because
a) Female vocal cord is longer
b) Male vocal cord is shorter
c) Male vocal cord is longer
d) The concept is not related
Noise pollution is harmful for
a) All
b) Human
c) Cat
d) Bird
Sound propagates maximum in
a) Solid
b) Gas
c) Liquid
d) All
Voice box or larynx of human
process
a) Sound
b) Wind
c) Loudness
d) None of the options
To an fro motion of an object is
called
a) Vibration
b) Waves
c) Amplitude
d) All of these
Sound is kind of
a) Energy
b) Work
c) Force
d) None of the options
The pitch of sound depends on
a) Frequency
b) Amplitude
c) Frequency and amplitude
d) None of the options
Large amplitude of sound
vibrations will produce:
a) Loud sound
b) Meak sound
c) Slow sound
d) Sheark
The voice box is called:
a) Larynx
b) Stomach
c) Heart
d) Mouth
The hearing range of human ear
is
a) 20 hz to 20,000 hz
b) Less than 20 hz
c) More than 20,000 hz
d) 20 hz to 25,000 hz
Eardrum is a part of
a) Hearing organ
b) Sound producing organ
c) Skeletal system
d) Reproductive organ
An Object Is Vibrating At 50 Hz.
What Is Its Time Period?
(a) 0.02 s
(b) 2 s
(c) 0.2 s
(d) 20 s
Consider The Following
Statements And Choose The Correct One:
(a) The pitch of a sound depends on the frequency of vibration.
(b) If the frequency of vibration is low, the sound produced has a low pitch.
(c) If the frequency of vibration is high, the sound produced has a high pitch.
(d) All the above.
The pitch of sound depends on
(a) frequency
(b) amplitude
(c) both of these
(d) none of these
When the amplitude is small, the
sound produced is:
(a) loud
(b) feeble
(c) low pitched
(d) none of these
Quesiton. Large amplitude of
sound vibrations will produce:
(a) loud sound
(b) slow sound
(c) meak sound
(d) shreak
Sound waves do not travel
through
(a) solids
(b) gases
(c) liquids
(d) vacuum
In sitar sound Is produced by:
(a) beating
(b) rubbing
(c) blowing
(d) plucking
A shehnai produces sound from:
(a) vibrating strings
(b) vibrating membrane
(c) vibrating air column
(d) none of these
Sound:
(a) can travel through vacuum
(b) cannot travel through
vacuum
(c) sound can sometimes travel through
(d) none of these vacuum
The Loudness Of Sound Is
Determined By Its:
(a) Amplitude of vibration
(b) Ratio of amplitude and frequency of vibration
(c) Frequency of vibration
(d) Product of amplitude and frequency of vibration
Chapter 14
CHEMICAL EFFECT OF ELECTRIC
CURRENT
In LEDs, the longer lead (wire) is always connected to the _______
terminal
a) negative
b) neutral
c) positive
d) Any
terminal
Tap water is a good conductor of electricity while distilled water
is not because
a) Tap
water contain salts
b) Distilled
water do not contain salt
c) Only
a) is correct
d) Both a & b is correct
When electrodes are immersed in water and electricity passed, the
bubbles formed on the positive terminal is actually _______ gas.
a) Hydrogen
b) Carbon
di oxide
c) Oxygen
d) Nitrogen
When electrodes are immersed in water and electricity passed, the
bubbles formed on the negative terminal is actually _______ gas.
a) Hydrogen
b) Carbon
di oxide
c) Oxygen
d) Nitrogen
Why do we add little dilute sulphuric acid to copper sulphate
solution during electroplating?
a) To
increase acidity
b) To increase conductivity
c) So
that the colour becomes more prominent
d) To
burn copper sulphate
A
coating of _________is deposited on iron to protect it from corrosion and
formation of rust
a) copper
b) aluminium
c) Zinc
d) silver
Chromium plating is done on many objects such as car parts, bath
taps, kitchen gas stove etc. Why?
a) It does
not corrode but prevents scratches
b) It
looks beautiful
c) It
costs less
d) Articles
can be sold at higher price
The process of depositing a layer of any desired metal on another
material by means of electricity is called ___________.
a) Electric
plating
b) Electroplating
c) Electric
depositing
d) None
of the above
Some liquids are good conductors of electricity and some are poor
conductors. Which one is a poor conductor?
a) Acidic
solution
b) Alkaline
solution
c) Common
Salt solution
d) Distilled
water
Tin cans, used for storing food, are made by electroplating tin
onto iron. Why?
a) Tin
gives a shiny appearance
b) To
make the vessel cheap
c) Tin is
less reactive than iron.
d) To
make the vessel lighter
In LEDs, the longer lead (wire)
is always connected to the _______ terminal
a) negative
b) neutral
c) positive
d) Any terminal
Tap water is a good conductor of
electricity while distilled water is not because
a) Tap water contain salts
b) Distilled water do not contain salt
c) Only a) is correct
d) Both a & b is correct
When electrodes are immersed in
water and electricity passed, the bubbles formed on the positive terminal is
actually _______ gas.
a) Hydrogen
b) Carbon di oxide
c) Oxygen
d) Nitrogen
When electrodes are immersed in
water and electricity passed, the bubbles formed on the negative terminal is actually
_______ gas.
a) Hydrogen
b) Carbon di oxide
c) Oxygen
d) Nitrogen
Why do we add little dilute
sulphuric acid to copper sulphate solution during electroplating?
a) To increase acidity
b) To increase conductivity
c) So that the colour becomes more prominent
d) To burn copper sulphate
A coating of _________is deposited on iron to protect it from
corrosion and formation of rust
a) copper
b) aluminium
c) Zinc
d) silver
Chromium plating is done on many
objects such as car parts, bath taps, kitchen gas stove etc. Why?
a) It does not corrode but prevents
scratches
b) It looks beautiful
c) It costs less
d) Articles can be sold at higher price
The process of depositing a
layer of any desired metal on another material by means of electricity is
called ___________.
a) Electric plating
b) Electroplating
c) Electric depositing
d) None of the above
Some liquids are good conductors
of electricity and some are poor conductors. Which one is a poor conductor?
a) Acidic solution
b) Alkaline solution
c) Common Salt solution
d) Distilled water
Tin cans, used for storing food,
are made by electroplating tin onto iron. Why?
a) Tin gives a shiny appearance
b) To make the vessel cheap
c) Tin is less reactive than iron.
d) To make the vessel lighter
Plastic wire is
a) An insulator
b) A conductor
c) An insulator and a conductor
d) None of the options
An electric lamp glows due to
a) Heating effect
b) Chemical effect
c) Magnetic effect
d) None
Electroplating prevents
a) Rusting
b) Current
c) Chemical effect
d) All
Flow of electron is called
a) Electric current
b) Electroplating
c) Electrodes
d) Electrolyte
Distilled water is
a) Poor conductor
b) Good conductor
c) Poor conductor and good conductor
d) None
Poor conductors are
a) All of these
b) Plastics
c) Clothes
d) Wood
Copper wire is a
a) Good conductor
b) Poor conductor
c) Good conductor and poor conductor
d) None of the options
An electrolyte is
a) A liquid that conducts current
b) A metal
c) A solution
d) All of these
Adding common salt to distilled
water makes it
a) Good conductor
b) Insulator
c) No
d) Both Good conductor and Insulator
Electroplating is based on
a) Chemical effect of electricity
b) Magnetic effect of electricity
c) Heating effect of electricity
d) Physical effect of electricity
The pure piece of metal which is
used to be plated, is made the
(a) anode
(b) cathode
(c) nematode
(d) posit rode
Which of the following solutions
is a good conductor of electricity?
(a) Glucose solution
(b) Lemon juice
(c) Alcohol solution
(d) Distilled water
(d) Vegetable oil
A sheet of pure copper is used
as
(a) cathode
(b) anode
(c) positrode
(d) negatrode
Which of the following
non-metals can be electroplated with copper?
(a) Sodium
(b) Iodine
(c) Silicon
(d) Carbon
(e) Phosphorus
Which of the following is not
used for electroplating any metal?
(a) Gold
(b) Silver
(c) Sodium
(d) Nickel
(e) Copper
Copper wire is a
(a) Good conductor
(b) Poor conductor
(c) Both a and b
(d) None of this
Iron objects can be protected by
electroplating them with
(a) chromium
(b) nickel
(c) zinc
(d) all of these
The substance which is conductor
of electricity is:
(a) rubber
(b) paper
(c) nails
(d) plastic
Which of the following is a good
conductor of electricity:
(a) istilled water
(b) tap water
(c) kerosene
(d) none of these
Which of the following does not
conduct electricity?
(a) Sugar solution
(b) Vinegar solution
(c) Lemon juice solution
(d) Caustic soda solution
Magnetic compass connected In a
circuit is used to check:
(a) magnetism in electric current
(b) slow current
(c) small current
(d) none of these
Waste from an electroplating
factory must be disposed off
(a) in the nearby river
(b) in the nearby pond
(c) in the nearby cornfield
(d) according to the
disposal guidelines of Waste Management Bodies
The cans, used for storing food,
are made by electroplating ……………. on to irons
(a) chromium
(b) zinc
(c) tin
(d) none of these
Adding lime water to tap water
makes it:
(a) an electrolyte
(b) electrolysis
(c) no change occur
(d) none of these
Waste from an electroplating
factory must be disposed off
(a) in the nearby river
(b) in the nearby pond
(c) in the nearby cornfield
(d) according to the
disposal guidelines of Waste Management Bodies
Chapter 15
SOME NATURAL PHENOMENA
It is a convention to call the charge acquired by a glass rod when
it is rubbed with silk as __________
a) Negative
b) Positive
c) Neutral
d) Can
be any one
A device used to test whether an object is carrying charge or not
is called ______.
a) Electrometer
b) Charge
meter
c) Electroscope
d) Chargoscope
During lightning actually _____________ takes place
a) Electric
discharge
b) Electric
charging
c) Electric
charge accumulation
d) All
of the above
During a thunderstorm which action may be done?
a) Using
Telephone having cord
b) Switching
on / off electric lights
c) Using a
mobile phone
d) None
of the above
To protect tall buildings from the damage of lightning, what can
be done?
a) Not
to build tall buildings
b) Install
lightning conductors
c) Install
many TV antennas
d) Have
a roof top garden with tall trees
A major earthquake occurred on 26th January 2001 in which part of
India?
a) Uri
(Kashmir)
b) Mumbai
(Maharastra)
c) Guwahati
(Assam)
d) Bhuj
(Gujarat)
During thunderstorm it is safer to
a) Carry
an open umbrella
b) Take
shelter under short trees
c) Take
shelter under tall trees
d) Stand
in open fields
The process of transferring charge from a charged body to earth is
called
a) transferring
b) Processing
c) Charging
d) Earthing
Seismograph is an instrument used to
a) Record
strength of wind
b) Record
vibrations of earthquake
c) Record
lightening
d) Record
temperature
The power of an earthquake is expressed in terms of magnitude on a
scale called
a) Righter
Scale
b) Quake
scale
c) Richter
Scale
d) Earth
Scale
It is a convention to call the
charge acquired by a glass rod when it is rubbed with silk as __________
a) Negative
b) Positive
c) Neutral
d) Can be any one
A device used to test whether an
object is carrying charge or not is called ______.
a) Electrometer
b) Charge meter
c) Electroscope
d) Chargoscope
During lightning actually
_____________ takes place
a) Electric discharge
b) Electric charging
c) Electric charge accumulation
d) All of the above
During a thunderstorm which
action may be done?
a) Using Telephone having cord
b) Switching on / off electric lights
c) Using a mobile phone
d) None of the above
To protect tall buildings from
the damage of lightning, what can be done?
a) Not to build tall buildings
b) Install lightning
conductors
c) Install many TV antennas
d) Have a roof top garden with tall trees
A major earthquake occurred on
26th January 2001 in which part of India?
a) Uri (Kashmir)
b) Mumbai (Maharastra)
c) Guwahati (Assam)
d) Bhuj (Gujarat)
During thunderstorm it is safer
to
a) Carry an open umbrella
b) Take shelter under
short trees
c) Take shelter under tall trees
d) Stand in open fields
The process of transferring
charge from a charged body to earth is called
a) transferring
b) Processing
c) Charging
d) Earthing
Seismograph is an instrument
used to
a) Record strength of wind
b) Record vibrations
of earthquake
c) Record lightening
d) Record temperature
The power of an earthquake is
expressed in terms of magnitude on a scale called
a) Righter Scale
b) Quake scale
c) Richter Scale
d) Earth Scale
The charge acquired by a glass
rod when it is rubbed with silk is
a) Positive
b) Negative
c) Negative and positive
d) None of the options
Benjamen Franklin showed
lightening in
a) 1752
b) 1725
c) 1527
d) 1572
Sparkers can be seen on electric
pole. When wires become
a) Loose
b) Tight
c) Wrinkle
d) None of the options
Interaction of charges is called
a) Lightening
b) Electrical discharge
c) Earthling
d) Electricity
Lightening occurs due to
a) Electric discharge
b) Rain
c) Wind
d) Lord varuns anger
The shaking of earth is called
a) Earthquake
b) Tsunami
c) Volcano
d) All of these
The like charges
a) Repel each other
b) Attract each other
c) No interaction takes place
d) All of these
Name the resin which produces
spark is
a) Amber
b) Gum
c) Gum and amber
d) None of the options
The Electric Nature Of Lightning
Was Established By A Scientist Named:
(a) Isaac Newton
(b) Robert Hooke
(c) Benjamin Franklin
(d) Thales
Which Of The Following Cannot Be
Charged By Friction, If Held By Hand?
(a) A plastic scale
(b) A copper rod
(c) An inflated balloon
(d) A woolen cloth
The like charges
(a) Repel each other
(b) Attract each other
(c) No interaction takes place
(d) All of these
When you touch a charged body,
the charge flows through you into the earth. What is this called?
(a) Induction
(b) Conduction
(c) Capacitance
(d) Earthing
The two objects rubbed against
each other:
(a) will gain elections
(b) will lose elections
(c) one will gain electrons
and other will lose electrons
(d) noise of these
Static electricity charges can
be produced by
(a) Heating
(b) Rubbing
(c) Beating
(d) none of these
The outermost layer of earth is
called
(a) Mountain
(b) Core
(c) Crust
(d) Mantle
On rubbing ………………… electricity
is produced.
(a) static
(b) current
(c) both (a) and (b)
(d) none of these
When object is rubbed than it
is:
(a) worn out
(b) charged
(c) spoiled
(d) not charged
The Boundaries Of The Earth
Plate Are Known As:
(a) Seismic zone and Fault
zone
(b) Seismic zone and Mantle
(c) Mantle zone and Inner core
(d) Fault zone, Mantle and Inner core
Which of the following cannot he
charged easily by fraction:
(a) a plastic scale
(b) a copper rod
(c) an inflated balloon
(d) swollen cloth
Interaction of charges is
called:
(a) lightning
(b) electrical discharge
(c) earthquake
(d) earthing
The power of an earthquake is
expressed on a scale called
(a) seismic scale
(b) iron scale
(c) richter scale
(d) large scale
Where is the lightning rod
attached to protect the building from lightning?
(a) On the top of the
building
(b) On the bottom of the building
(c) In the middle of the building
(d) All of these
It is a convention to call the
charge acquired by a glass rod when it is rubbed with silk as __________
(a) Negative
(b) Positive
(c) Neutral
(d) Can be any one
Which is the surest test of
charge on a body?
(a) Repulsion
(b) Lightning
(c) Combustion
(d) Insulation
Seismograph is an instrument
used to
(a) Record strength of wind
(b) Record vibrations
of earthquake
(c) Record lightening
(d) Record temperature
Chapter 16
LIGHT
If the angle of incidence of light falling on a plane mirror is
30degree, what will be the angle of reflection?
a) 90
degree
b) 60
degree
c) 30
degree
d) 0
degree
When we stand in front of our dressing table, our left hand seems
to be right and right seems to be left. This is called
a) Left-right
confusion
b) Lateral
inversion
c) Up
-side down phenomenon
d) mirage
Light passing through a prism splits into seven colours. This is
called
a) Dispersion
b) Dissolution
c) Division
d) None
of the above
Rainbow is a natural phenomenon showing
a) Reflection
b) Deflection
c) Dispersion
d) Diversion
In the retina of the eye, the area having no sensory cells is
called
a) iris
b) Blind
spot
c) cornea
d) Dark
spot
If light falls perpendicularly on a plane mirror, what will be the
angle in which it will be reflected?
a) 45
degrees
b) 90
degrees
c) 180
degrees
d) 360
degrees
7 Which of the following is not a luminous object?
a) sun
b) candle
c) moon
d) Tube
light
8 To make a kaleidoscope we require
a) Three
plane mirrors
b) Four
plane mirrors
c) Three
glass sheets
d) Four
glass sheets
9 In our eye _______cells can sense colour
a) Rod
b) Cone
c) Both
rod and cone
d) Neither
rod nor cone
10 An owl can see clearly at night but not day time because
it has
a) More
rods and few cones
b) Less
rod and more cones
c) More
rods and more cone
d) Less
rods and less cones
If the angle of incidence of
light falling on a plane mirror is 30degree, what will be the angle of
reflection?
a) 90 degree
b) 60 degree
c) 30 degree
d) 0 degree
When we stand in front of our
dressing table, our left hand seems to be right and right seems to be left.
This is called
a) Left-right
confusion
b) Lateral inversion
c) Up -side down phenomenon
d) mirage
Light passing through a prism
splits into seven colours. This is called
a) Dispersion
b) Dissolution
c) Division
d) None of the above
Rainbow is a natural phenomenon
showing
a) Reflection
b) Deflection
c) Dispersion
d) Diversion
In the retina of the eye, the
area having no sensory cells is called
a) iris
b) Blind spot
c) cornea
d) Dark spot
If light falls perpendicularly
on a plane mirror, what will be the angle in which it will be reflected?
a) 45 degrees
b) 90 degrees
c) 180 degrees
d) 360 degrees
Which of the following is not a
luminous object?
a) sun
b) candle
c) moon
d) Tube light
To make a kaleidoscope we
require
a) Three plane mirrors
b) Four plane mirrors
c) Three glass sheets
d) Four glass sheets
In our eye _______cells can
sense colour
a) Rod
b) Cone
c) Both rod and cone
d) Neither rod nor cone
An owl can see clearly at night
but not day time because it has
a) More rods and few
cones
b) Less rod and more cones
c) More rods and more cone
d) Less rods and less cones
Which of the following results
in diffused reflection?
(a) Plane mirror
(b) Shiny surface
(c) Silver
(d) Wood
Kaleidoscope is based on the
pattern of:
(a) reflection
(b) multiple reflection
(c) spectrum
(d) diffused reflection
If the angle of incidence is
50°, then calculate the angle between the incident ray and the reflected ray.
(a) 50°
(b) 100°
(c) 130°
(d) 80°
The perpendicular drawn to the
reflecting surface is called
(a) normal
(b) incident ray
(c) reflected ray
(d) none of these
Visually impaired people can
read and write using:
(a) Degital pens
(b) Electronic writer
(c) Braille system
(d) Hearing aids
The angle of reflection is equal
to the angle of incidence
(a) Sometimes
(b) Always
(c) Never
(d) Under special case
Band of seven colours is called
(a) VIBGYOR
(b) dispersion
(c) spectrum
(d) reflection
What is the nature of image
formed on the retina of human eye of an object?
(a) Virtual and erect
(b) Virtual and inverted
(c) Real and erect
(d) Real and inverted
The cells present in the retina
of eye and responding to colour are:
(a) Rod-shaped cells
(b) Both of these
(c) Cones
(d) None of these
Far point of a normal human eye
is situated at:
(a) 25 m
(b) 25 mm
(c) 25 cm
(d) Infinity
With what is glass coated in
order to convert it into a mirror?
(a) Silver
(b) Copper
(c) Aluminium
(d) Platinum
What is the name of object
through which light can pass?
(a) Opaque
(b) Translucent
(c) Transparent
(d) Luminous
A mirror has ____ surface.
(a) rough
(b) polished
(c) dark
(d) all of these
Which of the following is not a
source of light:
(a) Tubelight
(b) The sun
(c) The moon
(d) Fire fly
Beam of light, bounced back by
the surface after falling on it is called
(a) Reflecting ray
(b) Incident ray
(c) Refracted ray
(d) normal
Which Of The Following
Represents The Correct Statements?
(a) Outer zone of complete combustion is the hottest part which is blue in
colour.
(a) Middle zone of partial combustion is the moderate hot part which is yellow
in colour.
(a) Innermost zone of unburnt wax vapours is least hot which is black in
colour.
(a) All the above
Mohan Is Writing Some
Statements, Choose The Correct Statements And Help Him:
(a) Phosphorus is the only non-metal which catch fire if exposed to air.
(b) The lowest temperature at which a substance catches fire is called its
ignition temperature.
(c) Combustion is a chemical process in which a substance reacts with
oxygen to give off heat.
(d) All the above
Consider The Following
Statements, Choose The Incorrect One:
(a) The forest fires occur during the hottest summer day.
(b) It is very
difficult to burn a heap of dry leaves.
(c) The head of matchstick contains only antimony tri-Sulphide and
potassium chlorate.
(d) All the above
The Substance That Does Not Burn
With Flame Is:
(a) LPG
(b) Camphor
(c) Dry grass
(d) Charcoal
A full length image of a distant
tall building can definitely be seen by using
(a) a concave mirror
(b) a convex mirror
(c) a plane mirror
(d) both concave as well as plane mirror
Chapter 17
STARS AND SOLAR SYSTEM
1 If I am 13 years old, I have gone round the sun ___ times.
a) Never
gone round the sun
b) 13
c) 26
d) Shall
go round the sun when I shall be 15
2 The least dense planet is
a) Earth
b) Jupiter
c) Saturn
d) Uranus
3 ____ appears as a bright head with a long tail. The tail grows
in size as it approaches the sun.
a) Asteroid
b) Comet
c) Planet
d) Meteor
4 During a clear night sky, bright light streaks are often
visible. They are called shooting stars. They are actually
a) Falling
stars
b) Comet
c) Meteors
d) Planet
5 _____ was the first Indian satellite.
a) INSAT
b) EDUSAT
c) IRS
d) Aryabhatta
6 If Saturn is thrown into an ocean,
a) It will
float
b) It
will sink
c) It
will dissolve
d) It
will soak all water
7 It is difficult to observe Mars because
a) It is
the smallest planet of this universe
b) It is
too far away from our planet
c) It is
hidden by the glare of the sun
d) None
of the above
8 Ravi was looking for Venus in the sky at midnight. Mohan laughed
at him because Venus
a) Appears
1-3 hours after sunrise or 1-3 hours after sunset
b) Appears
1-3 hours before sunrise or 1-3 hours after sunset
c) Appears
1-3 hours before sunrise or 1-3 hours before sunset
d) Appears
1-3 hours after sunrise or 1-3 hours before sunset
9 Earlier we had 9 planets in our solar system of which one name
has been eliminated as per IAU (2006). The planet is
a) Uranus
b) Neptune
c) Pluto
d) Earth
10 Light Year is
a) Year
full of light
b) Year
having light work
c) Year
which earth shall become lighter
d) Distance
travelled by light in 1 year
If I am 13 years old, I have
gone round the sun ___ times.
a) Never gone round the sun
b) 13
c) 26
d) Shall go round the sun when I shall be 15
The least dense planet is
a) Earth
b) Jupiter
c) Saturn
d) Uranus
Question.____ appears as a
bright head with a long tail. The tail grows in size as it approaches the sun.
a) Asteroid
b) Comet
c) Planet
d) Meteor
4 During a clear night sky,
bright light streaks are often visible. They are called shooting stars. They
are actually
a) Falling stars
b) Comet
c) Meteors
d) Planet
5 _____ was the first Indian
satellite.
a) INSAT
b) EDUSAT
c) IRS
d) Aryabhatta
6 If Saturn is thrown into an
ocean,
a) It will float
b) It will sink
c) It will dissolve
d) It will soak all water
7 It is difficult to observe
Mars because
a) It is the smallest planet of this universe
b) It is too far away from our planet
c) It is hidden by the
glare of the sun
d) None of the above
8 Ravi was looking for Venus in
the sky at midnight. Mohan laughed at him because Venus
a) Appears 1-3 hours after sunrise or 1-3 hours after sunset
b) Appears 1-3 hours
before sunrise or 1-3 hours after sunset
c) Appears 1-3 hours before sunrise or 1-3 hours before sunset
d) Appears 1-3 hours after sunrise or 1-3 hours before sunset
9 Earlier we had 9 planets in
our solar system of which one name has been eliminated as per IAU (2006). The
planet is
a) Uranus
b) Neptune
c) Pluto
d) Earth
10 Light Year is
a) Year full of light
b) Year having light work
c) Year which earth shall become lighter
d) Distance travelled by light in
1 year
What is the gap between the
orbit of mars and Jupiter called?
a) Asteroids
b) Comets
c) Meteor
d) Meteorite
The tilting of the earth is
responsible for
a) Change of the season
b) Change of days
c) Change of the sun rays
d) None of the options
Stars appear to move from
a) East to west
b) West to east
c) North to south
d) South to west
Which is the largest planet in
solar system?
a) Jupiter
b) Mercury
c) Mars
d) Saturn
The first outside orbit of the
earth planet is
a) Mars
b) Jupiter
c) Saturn
d) Earth
Which is the farthest planet of
solar system?
a) Neptune
b) Jupiter
c) Mercury
d) Earth
Which planet appears to be
yellowish?
a) Saturn
b) Asteroids
c) Mars
d) Uranus
On which planet the life exists?
a) Earth
b) Moon
c) Jupiter
d) None of the options
Which is the nearest planet to
the sun?
a) Mercury
b) Neptune
c) Mars
d) Earth
Which is the brightest planet in
the universe?
a) Venus
b) Mercury
c) Earth
d) Saturn
A group of small stars is
called:
(a) Orion
(b) Pleiades
(c) Sirius
(d) The great bear
Which of the following Is not
outer planet:
(a) Venus
(b) Saturn
(c) Uranus
(d) Neptune
Consider The Following
Statements And Choose The Incorrect One:
(a) Meteoroids are members of the Solar System because they revolve around the
Sun.
(b) A meteor is called a shooting star because, viewed from the Earth, it looks
like a streak of starlight shooting across the night sky.
(c) A meteor which does not burn up completely on entering the Earth’s
atmosphere and lands on Earth, is known as meteorite.
(d) None of the above.
Identify the closest star to our
solar system.
(a) Proxima centauri
(b) Sirius
(c) Swati
(d) Ashwini
The brightest object in clear
night sky is
(a) Venus
(b) Sun
(c) Moon
(d) Star
Farthest planet of the solar
system is:
(a) Neptune
(b) Jupiter
(c) Mercury
(d) Earth
The Planet With A System Of
Well-Developed Rings Encircling It Is:
(a) Jupiter
(b) Venus
(c) Saturn
(d) Neptune
Which planet appears to be
yellowish?
(a) Asteroids
(b) Mars
(c) Uranus
(d) Saturn
Stars appear to move from
(a) West to east
(b) East to west
(c) North to south
(d) South to west
Which Of The Following Statement
Is Or Are Incorrect?
(a) Mars is also called the red planet because its surface appears red.
(b) Jupiter is the biggest planet of our solar system.
(c) Saturn is also made up mainly of hydrogen and helium.
(d) None of the above.
Distance between stars are
measured in:
(a) metres
(b) kilometres
(c) light year
(d) None of these
Star appear small because
(a) They are very far
(b) They have dim light
(c) They are smaller than moon
(d) They reflect the Sun
Which Of The Following Is Not A
Member Of The Solar System?
(a) Asteroids
(b) Morning Star
(c) Satellites
(d) Constellation
The Distances Between The
Various Celestial Objects Are Usually Expressed In The Unit Of:
(a) Kilometers
(b) Light minutes
(c) Light years
(d) Light seconds
The various shapes of bright
part of moon is called
(a) Parts of moon
(b) Ring of moon
(c) Cover of moon
(d) Phases of moon
Chapter 18
POLLUTION OF AIR AND WATER
1 Carbon monoxide in vehicle exhaust causes
a) Increased
oxygen carrying capacity of RBCs
b) Reduced
Nitrogen carrying capacity of RBCs
c) Reduced
oxygen carrying capacity of RBCs
d) Reduced
carbon carrying capacity of RBCs
2 Smog =
a) Smoke
in dog’s stomach
b) Smoke +
fog
c) Smoke
dog
d) frog
in fog
3 The gas used in refrigerating appliance causing serious damage
to ozone is
a) MFCs
b) CFCs
c) LPCs
d) DPCs
4 Acid rain mainly contains
a) Sodium
chloride
b) Sulphur
di oxide and Nitrogen di oxide
c) Hydrochloric
acid
d) Carbon
tetra chloride
5 Marble cancer is caused by
a) bacteria
b) virus
c) Acid
rain
d) Alkali
rain
6 Greenhouse effect is
a) Painting
house green in colour
b) Wearing
green colour dress
c) Having
green room in the house
d) Sun’s
heat is trapped and not allowed to escape
7 Greenhouse gases includes
a) CO2, Methane,
Nitrous oxide
b) CO2,
Argon, Nitrous oxide
c) CO2,
Methane, Chlorine
d) CO2,
Methane, Flourine
8 _____ is a commonly used chemical method for purifying water.
a) Brominization
b) Flourination
c) Filtration
d) Chlorination
9 Ganga Action Plan is associated with
a) Increase
of fish culture in the Ganges
b) Reduce
Ganga water pollution
c) Construct
more bridges over the Ganges
d) Increase
water transport on the Ganges
10 Van Mahotsav is
a) Planting
trees in January
b) Cutting
trees in January
c) Cutting
trees in July
d) Planting trees in July
Chlorofluorocarbon is used in
a) All
b) Refrigerators
c) Air conditioners
d) Perfumes
Pollution of water is
responsible for
a) All
b) Oil refineries
c) Paper factories
d) Sugar mills
CNG is a
a) Clean fuel
b) Polluted fuel
c) Harmful fuel
d) None of the options
What causes pollution
a) Human activities
b) Trees
c) Human activities and trees
d) None of the options
The percentage of nitrogen is
a) 0.78
b) 0.21
c) 0.12
d) 0.87
Green House gas is
a) Carbon dioxide
b) Nitrogen
c) Oxygen
d) Methane
Air pollution causes
a) Respiratory problems
b) Global warming
c) Soil erosion
d) None of the options
Most polluted river in the world
is
a) Ganga
b) Yamuna
c) Cavery
d) Chenab
The Taj Mahal is being affected
by
a) Air pollution
b) Noise pollution
c) Water pollution
d) None of the options
Highest percentage of air
consists of
a) Nitrogen
b) Oxygen
c) Carbon dioxide
d) Argon
The reason for greenhouse effect
is:
(a) Decrease in quantity of CO2 in atmosphere
(b) Increase in quantity of
CO2 in atmosphere
(c) Decrease in quantity of oxygen in atmosphere
(d) Increase in quantity of oxygen in atmosphere
Trapping of unescapable radiations
of sun in Earth’s environment is called:
(a) Earth warming
(b) Greenhouse warming
(c) Greenhouse effect
(d) None of these
Which Of The Following Is Not A
Way To Conserve Water?
(a) Replace
(b) Reduce
(c) Reuse
(d) Recycle
Heat is reflected from the
earth's surface and trapped in the atmosphere. Which phenomena is being
referred to?
(a) Global warming
(b) Ozone depletion
(c) Greenhouse effect
(d) Thermal pollution
The following gas is not an air
pollutant:
(a) Carbon dioxide
(b) Oxides of nitrogen
(c) Sulphur dioxide
(d) Oxygen
Air pollution causes
(a) Global warming
(b) Respiratory problems
(c) Soil erosion
(d) None of these
Incomplete burning of fuels
produces:
(a) Carbon dioxide
(b) Carbon particles
(c) Carbon monoxide
(d) None of these
One Of The Following Does Not
Contribute In Producing Acid Rain. This One Is:
(a) Nitrogen dioxide
(b) Nitrogen monoxide
(c) Carbon monoxide
(d) Sulphur dioxide
Most polluted river in the world
is:
(a) Yamuna
(b) Cavery
(c) Chenab
(d) Ganga
Most polluted river in the world
is:
(a) Yamuna
(b) Cavery
(c) Chenab
(d) Ganga
A poisonous gas emitted by
Mathura Refinery and other industries in and around Taj which cause acid rain
is:
(a) Carobon monoxide
(b) Methane
(c) Sulphur dioxide
(d) Oxygen
Pollution of water is
responsible for
(a) Oil refineries
(b) Paper factories
(c) Sugar mills
(d) All
The water that is purified and
fit for drinking is called
(a) Potable water
(b) Pure water
(c) Hard water
(d) Saline water
From which of the following bad
effects does the ozone layer in our atmosphere protect us?
(a) Carbon dioxide
(b) CFC's
(c) The sun's ultraviolet
rays
(d) All of the above
Identify the gas associated with
greenhouse effect.
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen dioxide
(d) Sulphur dioxide
Instead of the fossil fuels for
our energy requirements we can use :
(a) Solar energy
(b) Hydropower
(c) Wind energy
(d) All of these
Carbon monoxide in vehicle
exhaust causes
a) Increased
oxygen carrying capacity of RBCs
b) Reduced Nitrogen carrying capacity of RBCs
c) Reduced oxygen carrying capacity of RBCs
d) Reduced carbon carrying capacity of RBCs
Smog =
a) Smoke
in dog’s stomach
b) Smoke + fog
c) Smoke dog
d) frog in fog
The gas used in refrigerating
appliance causing serious damage to ozone is
a) MFCs
b) CFCs
c) LPCs
d) DPCs
Acid rain mainly contains
a) Sodium
chloride
b) Sulphur di oxide and Nitrogen di oxide
c) Hydrochloric acid
d) Carbon tetra chloride
Marble cancer is caused by
a) bacteria
b) virus
c) Acid rain
d) Alkali rain
Greenhouse effect is
a) Painting
house green in colour
b) Wearing green colour dress
c) Having green room in the house
d) Sun’s heat is trapped and not allowed to escape
Greenhouse gases includes
a) CO2,
Methane, Nitrous oxide
b) CO2, Argon, Nitrous oxide
c) CO2, Methane, Chlorine
d) CO2, Methane, Flourine
_____ is a commonly used
chemical method for purifying water.
a) Brominization
b) Flourination
c) Filtration
d) Chlorination
Ganga Action Plan is associated
with
a) Increase
of fish culture in the Ganges
b) Reduce Ganga water pollution
c) Construct more bridges over the Ganges
d) Increase water transport on the Ganges
Van Mahotsav is
a) Planting
trees in January
b) Cutting trees in January
c) Cutting trees in July
d) Planting trees in July
All Chapters MCQ Questions Class
8 Science with Answers
The microbe that reproduce only
inside the body of the host organism
a) Bacteria
b) Virus
c) Protozoa
d) Fungi
Disease like Dysentery and
Malaria are caused by:
a) Fungi
b) Bacteria
c) Protozoa
d) Virus
Micro organism use in the baking
industry for making breads
a) Algae
b) Fungi
c) Yeast
d) Moulds
Edward Jenner in 1798 discovered
the vaccine for ____
a) Chicken pox
b) Polio
c) Small pox
d) Rabies
Disease causing micro organisms
are called_____
a) Carriers
b) Pathogens
c) Antibodies
d) Microbes
Dengue fever is spread by
a) House fly
b) Female Anopheles mosquito
c) Female Aedes mosquito
d) Bees
Hepatitis B is spread by:
a) Bacteria
b) Virus
c) Protozoa
d) Fungi
Anthrax is caused by_____
a) Fungi
b) Bacteria
c) Protozoa
d) Virus
Robert Koch in 1876 discovered
the microbe causing _____ disease
a) Foot and mouth disease
b) Rust of wheat
c) Citrus Canker
d) Anthrax
Yellow vein mosaic of bhindi is
a disease caused in plants by_____
a) Bacteria
b) Virus
c) Protozoa
d) Fungi
Sodium Benzoate is a _____
a) Vaccine
b) Preservative
c) Antibiotic
d) Pesticide
Jellies are preserved by____
a) Salt
b) Vinegar
c) Sugar
d) Air tight packets
Raw mangoes are preserved by____
a) Sugar
b) Salt
c) oil
d) Cold treatment
Rhizobium is a kind of ____
a) Virus
b) Bacteria
c) Fungi
d) Protozoa
Fixing nitrogen in the soil is
done by___
a) Protozoa
b) Bacteria
c) Fungi
d) Virus
Setting of curd is promoted
by___
a) Yeast
b) Virus
c) Lacto bacillus
d) Rhizobium
AIDS is caused by___
a) Bacteria
b) Virus
c) Yeast
d) Algae
Yeast is used in the production
of ___
a) Sugar
b) Alcohol
c) Hydrochloric acid
d) Oxygen
The following is an antibiotic.
a) Sodium bi carbonate
b) Streptomycin
c) Alcohol
d) Yeast
The most common carrier of
communicable disease is___
a) Spider
b) Dragon fly
c) House fly
d) Ant
The bread or idli dough rises
because of ____
a) Kneading
b) Growth of yeast cells
c) Grinding
d) Heat
The process of conversion of
Sugar into Alcohol is called____
a) infection
b) fermentation
c) moulding
d) nitrogen fixation
Our atmosphere is made up of _____
% of nitrogen.
a) 72
b) 28
c) 78
d) 70
Which of the following is not a
preservative?
a) Sodium meta bisulphate
b) Sodium chloride
c) Sodium benzoate
d) Sodium Carbonate
Name the metal which can be cut
with knife.
a) Sodium
b) Sulphur
c) Iron
d) Zinc
Name the non metal which exists
in liquid form at room temperature.
a) Oxygen
b) Hydrogen
c) Bromine
d) Mercury
Name the non metal which has
lustre.
a) Diamond
b) Sulphur
c) Carbon
d) Graphite
Name a liquid metal.
a) Mercury
b) Bromine
c) Hydrogen
d) Copper
Oxides of non-metals are ____ in
nature.
a) acidic
b) basic
c) neutral
d) none of the above.
Iron is galvanized by coating
with__
a) nickel
b) tin
c) zinc
d) copper
Which of the following element
will form basic oxides?
a) Sulphur
b) Nitrogen
c) Sodium
d) Carbon
The green coating on the top of
the copper vessel is a mixture of___
a) CuSO4 and CuCO3
b) Cu(OH)2 and CO2
c) CuSO4 and CuO
d) Cu(OH)2 and CuCO3
Name the non-metal which is
applied on wounds as an antiseptic.
a) Iodine
b) Nitrogen
c) Chlorine |
d) Carbon
SO2 + H2O → ____
a) H2S2O3
b) H2SO3
c) H2SO4
d) H2S2O7
Which of the following reactions
will takes place?
a) CuSO4 + Fe
b) FeSO4 + Cu
c) ZnSO4 + Cu
d) ZnSO4 + Fe
The reaction CuSO4 + Zn → ZnSO4
+ Cu, will take place because;
a) Zn is less reactive than Cu
b) Cu is more reactive than Zn
c) Zn is more reactive than
Cu
d) Both have equal reactivity.
Which property of a metal is
used in making bells, gangs etc?
a) Lustre
b) Malleability
c) Ductility
d) Sonorous
Name non metal which is stored
in water.
a) Phosphorous
b) Sulphur
c) Chlorine
d) Bromine
Which non metal is used in water
purification?
a) Chlorine
b) Phosphorus
c) Sulphur
d) Bromine
Acidic solution changes_____
a) Red litmus to blue
b) Blue litmus to red
c) Red litmus to green
d) No change
____ is an example of metalloid.
a) Potassium
b) Calcium
c) Carbon
d) Germanium
Which of the followings can be
drawn into wires?
a) Neon
b) Carbon
c) Sulphur
d) Copper
100% pure gold is expressed as
___ carat gold.
a) 24
b) 26
c) 18
d) 21
Metals react with acids and
produce____ gas.
a) H2
b) O2
c) N2
d) Cl2
Name the nonmetal used in fire
crackers.
a) Phosphorus
b) Carbon
c) Potassium
d) Chlorine
The smallest unit of an element
is called____
a) atom
b) molecule
c) compound
d) none of the above
Rust is _____
a) iron oxide
b) iron hydroxide
c) iron sulphate
d) calcium carbonate
Which of the following is a
base?
a) Ca(OH)2
b) CO2
c) H2SO3
d) HNO3
Name the compound present in the
head of match stick.
a) Antimony trisulphide
b) Potassium chlorate and
antimony trisulphide
c) White phosphorous and potassium chlorate
d) Red phosphorous and potassium chlorate
Which one does not burn with a
flame?
a) Candle
b) Coal
c) Kerosene oil
d) Molten wax
A chemical process in which a
substance reacts with oxygen to give off heat is_______.
a) Photosynthesis
b) Respiration
c) Combustion
d) Transpiration
In the Sun, heat and light are
produced by___.
a) Combustion
b) Explosion
c) Nuclear reaction
d) Conduction
Magnesium burns in air to
produce___
a) Mg(OH)2
b) MgO
c) MgO2
d) MgCO3
Inflammable substances have:
a) high ignition temperature
b) low ignition temperature
c) no ignition temperature
d) high boiling point.
Choose the best fire
extinguisher.
a) Oxygen
b) Water
c) Carbon dioxide
d) Blanket
The hottest part of a candle
flame:
a) luminous zone
b) dark zone
c) hot zone
d) non-luminous zone.
The colour of middle zone of the
candle flame is:
a) Orange
b) Black
c) Yellow
d) Blue
Complete combustion of wax
vapours takes place in____
a) middle zone
b) luminous zone
c) non-luminous zone
d) dark zone
The calorific value of wood when
compared to LPG is:
a) less
b) more
c) same
d) no colorific value
The unit of calorific value is:
a) kJ/kg
b) kg/kJ
c) kB/kJ
d) g/kJ
Global warming is a result of:
a) increased O2
b) increased CO2
c) increased water vapour
d) increased CO
A very poisonous gas:
a) Carbon dioxide
b) Nitrogen
c) Carbon monoxide
d) Oxygen
A cleaner fuel for automobiles:
a) Petrol
b) Diesel
c) CNG
d) LPG
This can not be used for fires
involving electrical equipments:
a) Carbon dioxide
b) Oxygen
c) Water
d) Fire extinguisher
A liquid fuel used in homes:
a) water
b) LPG
c) CNG
d) cooking oil
Carbon monoxide is produced by:
a) incomplete combustion of
fuels
b) explosion of fuels
c) complete combustion of fuels
d) sleeping in a closed room
Sources of heat energy for
domestic and industrial purposes are:
a) Matchstick
b) fuel
c) petrol
d) heater
For melting gold and silver, a
gold smith uses:
a) inner most zone of a flame
b) the least hot region
c) non-luminous zone
d) dark zone
The zone of partial combustion
is___________.
a) luminous zone
b) innermost zone
c) dark zone
d) non-luminous zone
Use of Diesel and Petrol as fuel
in automobiles is being replaced by:
a) LPG
b) CNG
c) Coal
d) Bitumen
When an electrical equipment is
on fire, the best extinguisher to be used is:
a) water
b) sunlight
c) CO2
d) O2
What is the telephone number of
fire service in Saudi Arabia?
a) 997
b) 998
c) 999
d) 993
When compared to wood the
ignition temperature of kerosene oil is:
a) higher
b) lower
c) the same
d) no ignition temperature
Friction is a:
a) contact force
b) non contact force
c) Both ‘a‘ and ‘b’
d) none of these.
Name the force that always
opposes motion.
a) Electrostatic force
b) magnetic force
c)Frictional force
d) muscular force
Which of the following is not a
lubricant?
a) Air cushion
b) Graphite
c) Sand
d) Powder
Frictional force exerted by
______________________ is called drag.
a) gases
b) solids
c) liquids
d) both ‘a’ and ‘c’
Name the device which is used to
reduce friction in the axles of cars and shafts of electric motors.
a) Screws
b) Ball- bearings
c) Nuts
d) Bolts
The force due to rolling,
static, and sliding friction in the increasing order is:
a) rolling, static, sliding
b) rolling, sliding, static
c) static, sliding, rolling
d) sliding, static, rolling
The frictional force exerted by
fluids is called:
a) thrust
b) drag
c) rolling friction
d) dynamic friction
Powder is used in carom board
for:
a) increasing friction
b) decreasing friction
c) decoration
d) fragrance
A streamlined body:
a) increases friction
b) reduces friction
c) decreases weight
d) increases weight
Spikes are provided in the shoes
of athlete:
a) for decoration
b) to increase friction
c) to decrease friction
c) none of the above.
The force which prevents us from
slipping while walking on the road is:
a) muscular force of our body
b) gravitational pull by earth
c) friction force
d) balanced forces of nature
Which of the following is not a
type of force?
a) Muscular
b) Magnetic
c) Chemical
d) Pulling a bucket of water from a well
Force of friction between two
bodies is _______________.
a) parallel to contact
surface
b) perpendicular to contact surface
c) inclined to contact surface
d) a non contact force
Which of the following is a non
contact force?
a) Muscular
b) Electro static attraction
c) Frictional force
d) Elastic spring force
Pressure exerted by a liquid:
a) increases with depth
b) decreases with depth
c) is constant
d) first increases then decreases.
The mountain climber experiences
a nose bleeding due to:
a) decrease in atmospheric
pressure
b) increase in atmospheric pressure
c) more gravitational pull
d) effect of high altitude
In humans, sound is produced by:
a) Larynx
b) Wind pipe
c) Vocal cords
d) Lungs
The voice of men, women and
children are different due to difference in:
a) Larynx
b) Lungs
c) Vocal cords
d) Wind pipe
The velocity of sound in air is:
a) 330m/s
b)150m/s
c) 265m/s
d) 3000m/s
To and fro motion of an object
is called ____________________.
a) periodic motion
b) oscillatory motion
c) cyclic motion
d) none of these
An object oscillates 50 times in
one second. What would be its frequency?
a) 0.2HZ
b) 0.02 HZ
c) 10 HZ
d) 50HZ
Pitch of a sound depends on:
a) Frequency
b) amplitude
c) loudness
d) distance from the source
If you go on increasing the
stretching force on a wire in a guitar, its frequency:
a) increases
b) decreases
c) remains unchanged
d) none of the above.
Vibration of air column produces
sound in which of the following instrument?
a) Jalataranga
b) Flute
c) Guitar
d) Tabala
Loudness of a sound is
determined by the ___________________ of vibration.
a) amplitude
b) frequency
c) time period
d) pitch
The unit of frequency is:
a) Hz
b) dB
c) Hz -1
d) dB -1
The audible frequency range of
human ear is:
a) 20 Hz to 20,000 Hz
b) below 20 Hz
c) Above 20,000 Hz
d) 20 KHz to 25 KHz
Image formed in a plane mirror
undergoes_________________ inversion.
a) plane
b) similar
c) dissimilar
d) lateral
Beautiful patterns are formed in
a Kaleidoscope because of multiple___________.
a) reflection
b) refraction
c) diffraction
d) dispersion
Splitting of light into its
constituent colours is know as:
a) Diffused reflection
b) Scattering
c) Dispersion
d) Reflected ray
Visually challenged person can
read and write using the ____ system.
a) Metric
b) Nervous
c) Solar
d) Braille
Lack of vitamin____ in food
stuff is responsible for many eye troubles.
a) K
b) A
c) D
d) C
The impression of an image does
not vanish immediately from the retina. It persists there for about____ of a
second.
a) ¼
b) 1/8
c) 1/16
d) 1/20
The most comfortable distance at
which one can read with a normal eye is about:
a) 15 cm
b) 25 cm
c) 30 cm
d) 35 cm
At the junction of the optic
nerve and the retina there are no sensory cells, this is called:
a) Black spot
b) Red spot
c) Blind spot
d) Brown spot
The transparent front part of
the eye is _____
a) Retina
b) Cornea
c) Iris
d) Lens
The part of the eye which gives
it its distinctive colour:
a) Iris
b) Cornea
c) Pupil
d) Retina
Behind the pupil of the eye is a
lens which is thick in the centre, it is called___
a) concave lens
b) bifocal lens
c) convex lens
d) cylindrical lens.
The periscope makes use of ____
plane mirrors.
a) five
b) two
c) three
d) four
The light ray, which strikes any
surface, is called the ____
a) normal ray
b) reflected ray
c) incident ray
d) total internal reflection
When all the parallel rays
reflected from a plane surface are not parallel the reflection is known as:
a) Diffused or irregular
reflection
b) Lateral inversion
c) Regular reflection
d) Multiple images
The objects which emit their own
light are known as ____ objects.
a) non-luminous
b) transparent
c) translucent
d) luminous
The objects which shine in the
light of other objects are called_____ objects.
a) Luminous
b) Illuminated
c) Artificial
d) Opaque
The cells which are sensitive to
bright light are called:
a) Lens
b) Rods
c) Cones
d) Cataract.
The cells which are sensitive to
dim light are called:
a) Cones
b) Rods
c) Retina
d) Pupil
The opaque lens is removed and a
new artificial lens is inserted in:
a) Cornea
b) Night blindness
c) Cataract
d) Trachoma
Which of the following is rich
in vitamin-A?
a) Cod liver oil, Papaya,
Mango
b) Cereals, Brinjal, Cucumber
c) Brinjal, Bitter guard, Spinach
d) All of the above.
An image formed on a screen is called:
a) Virtual image
b) Real image
c) Bright spot
d) Blind spot
The image formed by a plane
mirror is:
a) Real, inverted, virtual
b) Erect, virtual, smaller in size than the object
c) Virtual, erect and magnified
d) Erect, virtual, same size
as the object.
How many images of a coin are
formed when it is placed between two plane mirrors which are kept at right
angles to each other?
a) one
b) two
c) three
d) four
In a kaleidoscope the reflecting
mirrors are kept at ______
a) perpendicular
b) parallel
c) an angle of 45°
d) an angle of 60°
The Braille code used by blind
people use dot patterns for words. How many dot patterns are used for this
code?
a) 52
b) 63
c) 48
d) 26
The nearest star to the planet
earth is:
a) Venus
b) Sun
c) Moon
d) Alpha
Orion is a name of a ______
a) star planet
b) planet
c) galaxy
d) constellation
The largest planet of the solar
system:
a) Mars
b) Sun
c) Jupiter
d) Saturn
A body revolving around another
body is called as:
a) Orion
b) Stars
c) Sun
d) Satellite
Name the comet which appears
after every 76 years:
a) Hallet’s
b) Meteor
c) Halley’s
d) Pole star
The first Indian satellite:
a) Kalpana-1
b) Aryabhatta
c) INSAT
d) EDUSAT
Distances of stars are expressed
in:
a) km
b) square meter
c) light year
d) meters
The star appears to be
stationary from the Earth:
a) Pole star
b) Sirius
c) Orion
d) Ursa Major
The bright star like objects
with a long tail approaching the Sun in a highly elliptical orbit is called:
a) Celestial bodies
b) Meteor
c) Comets
d) Stars
The un-burnt piece of meteor
which reaches the surface of the earth:
a) Celestial bodies
b) Meteorites
c) Comets
d) Stars
Meteors are commonly known as:
a) Comets
b) Stars
c) Asteroids
d) Shooting stars
In Indian astronomy planets are
called:
a) Objects
b) Graha
c) Budha
d) Bodies
The motion of the earth around
the Sun is called:
a) Change of season
b) Revolution
c) Rotation
d) Orbits
The planet also known as morning
star is _____
a) Mars
b) Mercury
c) Jupiter
d) Venus
One light year is equal to:
a) 18X106 km
b) 40.67X1012 km
c) 9.46X1012 km
d) 150,000,000 km
Jupiter has a thick atmosphere
of _____ which reflects most of the sun light falling on it.
a) Oxygen
b) Helium
c) Nitrogen
d) Hydrogen
____ was launched in the honour of Kalpana Chawla,
a space scientist of Indian origin, who died in mishap in a space vehicle.
a) INSAT-3E
b) INSAT-3D
c) INSAT-1A
d) INSAT-IID
Solar eclipse occurs on _______
a) full moon day
b) new moon day
c) both ‘a’ and ‘b’
d) none of the above
Stars produce heat energy and
light due to the fusion of_______
a) Oxygen
b) Hydrogen
c) Helium
d) Ozone
Stars appear to move from______
in the sky.
a) west to east
b) east to west
c) north to south
d) south to north
Ursa Major moves around the
_______
a) Sun
b) Earth
c) Moon
d) Pole Star
In 2006, the IAU adopted a new
definition of a planet. IAU stands for___
a) Indian Astronomical Union
b) International Astronomy of Universe
c) International
Astronomical Union
d) Indian Astronomy of Universe
Name the planet which is least
dense among all the planets.
a) Mercury
b) Mars
c) Saturn
d) Jupiter
The axis of the Earth is
inclined to its orbital plane at an angle of:
a) 23.5°
b) 66.5°
c) 25.3°
d) 65.5°
1. The yeast multiply by a
process called
(a) Binary fission
(b) Budding
(c) Spore formation
(d) None of the above
2. The example of protozoan is
(a) Penicillium
(b) Blue green algae
(c) Amoeba
(d) Bacillus
3. the most common carriers of
communicable diseases is
(a) Ant
(b) Housefly
(c) Dragonfly
(d) Spider
4. The following is an antibiotic
(a) Alcohol
(b) Yeast
(c) Sodium bicarbonate
(d) Streptomycin
5. Yeast produces alcohol and
carbon dioxide by a process called
(a) Evaporation
(b) Respiration
(c) Fermentation
(d) Digestion
6. The algae commonly used as
fertilizers are called
(a) Staphylococcus
(b) Diatoms
(c) Blue green algae
(d) None of the above
7. Cholera is caused by
(a) Bacteria
(b) Virus
(c) Protozoa
(d) Fungi
8. Plant disease citrus canker
is caused by
(a) Virus
(b) Fungi
(c) Bacteria
(d) None of these
9. The bread dough rises because
of
(a) Kneading
(b) Heat
(c) Grinding
(d) Growth of yeast cells
10. Carrier of dengue virus is
(a) House fly
(b) Dragon fly
(c) Female Aedes Mosquito
(d) Butterfly
11. Yeast is used in the
production of
(a) Sugar
(b) Alcohol
(c) Hydrochloric acid
(d) Oxygen
12. The vaccine for smallpox was
discovered by
(a) Robert Koch
(b) Alexander Fleming
(c) Sir Ronald Ross
(d) Edward Jenner
13. Chickenpox is caused by
(a) Virus
(b) Fungi
(c) Protozoa
(d) Bacteria
14. The bacterium which promote
the formation of curd
(a) Rhizobium
(b) Spirogyra
(c) Bread mould
(d) Lactobacillus
15. Plasmodium is a human
parasite which causes
(a) Dysentery
(b) Sleeping sickness
(c) Malaria
(d) All of the above
16. The bacterium Bacillus
Anthracis was discovered by
(a) Edward Jenner
(b) Alexander Fleming
(c) Louis Pasteur
(d) Robert Koch
17. Carrier of malaria causing
protozoan is
(a) Butterfly
(b) Housefly
(c) Female Anopheles Mosquito
(d) Cockroach
18. The process of conversion of
sugar into alcohol is called
(a) Infection
(b) Moulding
(c) Nitrogen fixation
(d) Fermentation
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