Question bank

Chapter-1   Introduction To Chemistry
Q-1 Fill in the blanks
(1) L.P.G is used for ________.
(2) John Dalton was born in ________.
(3) The full form of TNT is ________.
(4) Radioactivity was discovered by _______.
Q-2 State True or False
(1) Snake’s venom is not a poisonous chemical.
(2) Dyes for rock painting has been used since ancient time
(3) Chemistry doesn’t include the study of substances.
(4) Nylon is not a synthetic fibre.
(5) Nuclear energy can never be an alternative source of energy.
Q-3 Match the following
Q-4 Very short answer type questions
(1) What is science?
(2) What is chemistry?
(3) What do you mean by alchemy?
(4) Write any one example of a fertiliser.
(5) Write the definition of an insecticide.
Q-5 Short answer type questions
(1) Write the name of the chemical which are found in chillies and lemons?
(2) Explain the role of chemistry in ancient India.
(3) Write the full forms of the following: (a) TNT (b) LPG
(4) Write one example for each of the following: (a) Fungicide (b) Weedicide
(5) Explain the importance of chemistry in industry.
Q-6 Long answer type questions
(1) Name the scientists who discovered the following: (a) Polythene (b) Hydrogen (c) Aspirin
(2) Write the composition of- (a) Talcum powder (b) Cement (c) Toothpaste
(3) Write any three disadvantages of chemistry.
(4) Write short notes on- (a) Iron Pillar of Delhi (b) RDX (c) Dmitri Mendeleev
(5) What is the contribution of chemistry in the following fields? (a) Clothing (b) Cosmetics (c) Medicines (d) Food preservation (e) Comforts and pleasure
Multiple Choice Questions
Q-1 Endosulfan was used as

(i)

Insecticide

(ii)

Germicide

(iii)

Fungicide

(iv)

Enzyme
Q-2 Out of these, which one is a weedicide?

(i)

DDT

(ii)

BHC

(iii)

TNT

(iv)

Metalachlor

Q-3 Ammonium phosphate is a

(i)

Insecticide

(ii)

Herbicide

(iii)

Hormone

(iv)

Fertiliser

Q-4 Out of these which one is not a medicine?

(i)

Tetracycline

(ii)

Paracetamol

(iii)

Chloroquine

(iv)

BHC

Q-5 The full form of BHC is

(i)

Benzene hexa chlorine

(ii)

Boron hexa chloride

(iii)

Benzene hexa chloride

(iv)

Benzene hexa carbon
Chapter-2   Common Laboratory Apparatus and Equipment
Q-1 Fill in the blanks
(1) Chemistry is a branch of science which is mostly based on ____________.
(2) The desiccator is used to remove ____________ from a substance.
(3) The bunsen burner has different parts like base, hole, collar and ____________.
(4) ____________ or Bunsen burner is a source of heat in chemistry
Q-2 State True or False
(1) A funnel is used for filtration.
(2) A tripod stand is made of wood.
(3) A pipette is used in titration.
(4) Do wear gloves while working in a laboratory.
(5) Corrosive chemicals catch fire easily
Q-3 Match the following:
Q-4 Very short answer type questions
(1) State any two laboratory rules
(2) Why are students not allowed to mix up any chemicals without approval from the subject teacher?
(3) Write the names of five glass apparatus which are used in a chemistry laboratory.
(4) Which apparatus is used for collecting gas?
Q-5 Short answer type questions
(1) Mention one use of each apparatus (a) Test tube (b) Conical flask
(2) Which apparatus is used to measure an accurate volume of liquid?
(3) Write the role of an air adjuster in a Bunsen burner.
(4) Write the name of four items of daily use which have been made using the knowledge of chemistry
Q-6 Long answer type questions
(1) Draw the diagram of the following apparatus: (a) Test-tube holder (b) Wash bottle
(2) Write the procedure of measuring the volume of water.
(3) Write a short note on laboratory safety rules.
(4) Label A, B, and C in the diagram given here.
Multiple Choice Questions
Q-1 The measuring cylinder is used to

(i)

measure volume of liquid

(ii)

measure density of liquid

(iii)

measure temperature of gas

(iv)

measure mass of gas
Q-2 The wire gauze is made of

(i)

copper

(ii)

iron

(iii)

gold

(iv)

silver
Q-3 Out of these, which one is used for the preparation of organic compounds and gases?

(i)

desiccator

(ii)

beehive shelf

(iii)

volumetric flask

(iv)

round-bottom flask

Q-4 While lighting the bunsen burner, out of these, which colour zone does not appear?

(i)

dark zone

(ii)

yellow zone

(iii)

blue zone

(iv)

green zone

Q-5 Identify the symbol.

(i)

corrosive

(ii)

explosive

(iii)

flammable

(iv)

toxic
Chapter-3   Elements and Compounds
Q-1 Fill in the blanks
(1) Solid has definite ___________ and definite mass
(2) Pure substances have ___________ composition.
(3) Proton is a ___________ charged particle.
(4) Ca is the symbol of ___________.
(5) The symbol of gold is ___________.
Q-2 State True or False
(1) In a compound, constituents are present in definite proportion by mass.
(2) H is an example of a noble gas
(3) Hydrochloric acid is found in solid state
(4) Atoms are the building blocks of all matter.
(5) An ion carries positive or negative charge.
Q-3 Match the following
Q-4 Very short answer type questions
(1) Write a characteristic of solid.
(2) Write the definitions of elements and compounds.
(3) What is a metal? Give three examples.
(4) What is a symbol?
(5) What is a molecule?
Q-5 Short answer type questions
(1) Write two examples of a non-metal.
(2) Write any four characteristic of a non-metal.
(3) Which elements are generally found in living beings?
(4) Write the Latin name of– (a) Potassium (b) Sodium (c) Zinc
(5) Write the symbols of the following elements (a) Boron (b) Silicon (c) Neon
Q-6 Long answer type questions
(1) Identify each of the following as metal, non-metal or metalloid and write two uses of each.
(2) Write any four characteristics of compounds
(3) Write the names of elements which are found in the following compounds: (a) Sugar (b) Silica (c) Copper chloride
(4) Write the formula of (a) Ammonia (b) Glucose (c) Methane
Multiple Choice Questions
Q-1 Two or more than two different elements that are bounded together is called

(i)

a element

(ii)

compound

(iii)

mixture

(iv)

solution
Q-2 Chalk consists of

(i)

calcium

(ii)

carbon dioxide

(iii)

oxygen

(iv)

all of them

Q-3 Carbon, hydrogen and oxygen are combined together to make

(i)

Sugar

(ii)

Polythene

(iii)

Chalk

(iv)

Common salt
Q-4 Cu is a symbol of

(i)

Copper

(ii)

cobalt

(iii)

curium

(iv)

carbon
Q-5 Sand is made up of

(i)

Silicon

(ii)

oxygen

(iii)

glass

(iv)

both a and b

Chapter-4   Air and Atmosphere
Q-1 Fill in the blanks
(1) When air is in ____________ it is called wind.
(2) The component of air that supports burning is called ____________.
(3) Our earth is surrounded by ____________.
(4) The aquatic animals use dissolved oxygen in water for respiration. This is possible because oxygen is ____________ in water.
(5) Nitrogen in the air is used on a large scale to manufacture ____________.
Q-2 State True or False
(1) We cannot see air.
(2) A firki rotates only in an open area or in a closed room with the ceiling fan switched on.
(3) Air is an opaque material.
(4) All living organisms require air for their survival.
(5) Air contains water vapours.
Q-3 Match the following
Q-4 Very short answer type questions
(1) What is the composition of air ?
(2) What is atmosphere ?
(3) Write the two uses of oxygen.
Q-5 Short answer type questions
(1) Name the gases present in the air. Which one of them is most abundant?
(2) How will you say that air is dissolved in water?
(3) Name two processes supported by oxygen present in the air.
(4) Write the characteristics of ideal fuels.
(5) What will happen if the amount of oxygen is increased in the air?
Q-6 Long answer type questions
(1) Prove that oxygen has 1/5th part in the air
(2) List five activities that are possible due to the presence of air.
(3) The mountaineers carry oxygen cylinders with them while climbing high mountains. Why?
(4) Explain oxygen with the help of a flow diagram.
(5) . What are the different ways by which air pollution can be controlled?
Multiple Choice Questions
Q-1 Major part of the air is constituted by

(i)

nitrogen

(ii)

oxygen

(iii)

carbon dioxide

(iv)

inert gases
Q-2 Which of the following gases helps in burning?

(i)

Nitrogen

(ii)

Oxygen

(iii)

Carbon dioxide

(iv)

Carbon monoxide
Q-3 Which of the following gases do we use in breathing?

(i)

Carbon dioxide

(ii)

Nitrogen

(iii)

Oxygen

(iv)

None of these
Q-4 Wind is

(i)

air around us

(ii)

rising hot air

(iii)

air in motion

(iv)

none of these
Q-5 Air is present

(i)

in atomsphere

(ii)

in soil

(iii)

in water of ponds, lakes and seas

(iv)

everywhere

Chapter-5   Water
Q-1 Fill in the blanks
(1) Large part of the where is earth’s surface is covered with __________.
(2) The water in the ocean is very __________ in taste.
(3) The process of conversion of vapour into liquid is known as __________.
(4) Falling of __________ is called precipitation.
(5) Most of the water that human beings use comes from __________.
Q-2 State True and False
(1) Oceans are the major source of sweet water
(2) The process of condensation is opposite to evaporation.
(3) Rains feed almost all other sources of water.
(4) Our body contains about 98% of water
(5) The groundwater is actually the rain water. 
Q-3 Match the following
Q-4 Very short answer type questions
(1) Explain the states of water
(2) Explain rainwater harvesting.
(3) What is water pollution?
(4) What are the causes of flood and drought?
(5) Write the names and symptoms of four water–borne diseases.
Q-5 Short answer type questions
(1) What percentage of water is found in human blood and a fish?
(2) Write the two major sources, each of natural water, surface water and underground water.
(3) Give the answer the following: (a) Which source of water contains the highest concentration of salt in it? (b) Why is spring water pure enough for drinking but unsuitable for laboratory use?
(4) Why is sometimes flood benefits to farmers?
(5) Write the four benefits of water
Q-6 Long answer type questions
(1) Explain the ground water.
(2) What is the water table?
(3) Explain water cycle.
(4) Write the definitions of the following: (a) Solute (b) Solvent (c) Solution (d) Saturated solution (e) Aqueous solution
(5) Define the following: (a) Sterilization (b) Sedimentation (c) Loading (d) Aeration
Multiple Choice Questions
Q-1 Which one is the purest form of water?

(i)

River water

(ii)

Ground water

(iii)

Ocean water

(iv)

Rainwater

Q-2 Circulation of water between oceans and land is known as :

(i)

water cycle

(ii)

rain cycle

(iii)

water management

(iv)

water harvesting
Q-3 The percentage of water in a potato is

(i)

88%

(ii)

75%

(iii)

90%

(iv)

95%
Q-4 Out of these, which is not a source of surface water?

(i)

Rainwater

(ii)

River and lake water

(iii)

Spring water

(iv)

Sea water

Q-5 Boiling point of water is

(i)

100°C

(ii)

99°C

(iii)

101°C

(iv)

102°C
Chapter-6   Matter
Q-1 Fill in the blanks
(1) Everything, living or non-living, is part of the ____________.
(2) ____________ organism do not exhibit any form of life.
(3) Cement is a ____________ matter
(4) Solid is very difficult to ____________.
(5) ____________ have no definite shape.
Q-2 State True or False
(1) Boiling point of ethanol is 100°C
(2) Solid changing to liquid is called fusion.
(3) When a solid is heated, its atoms vibrate slowly about their fixed position.
(4) In gaseous state, the interparticle spaces are very large.
(5) The zig-zag motion of gas particles is called spreading motion.
Q-3 Very short answer type questions
(1) What is matter?
(2) What do you mean by density?
(3) Why do you smell a flower from distance?
(4) What is common in the three states of matter?
(5) What is latent heat of vaporization?
Q-4 Short answer type questions
(1) Write the characteristics of matter
(2) Write the difference between gas and vapour
(3) Write the two differences between boiling and evaporation.
(4) A gas exerts pressure on the walls of the container. Why?
(5) Does the evaporation of a liquid occur only at a fixed temperature?
Q-5 Long answer type questions
(1) Write the four properties of gas
(2) Write the differences between solid, liquid and gas.
(3) Give reasons for the following observations: (a) Naphthalene balls dissappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away
(4) Write the definitions of the following: (a) Sublimation (b) Boiling point (c) Condensation point (d) Vapour
Multiple Choice Questions
Q-1 Which of the following is matter?

(i)

Story

(ii)

Thought

(iii)

Cold

(iv)

Juice

Q-2 Which of the following has the strongest force of attraction at room temperature?

(i)

Gas

(ii)

liquid

(iii)

Solid

(iv)

Plasma
Q-3 Which condition out of the following will increase the evaporation of water?

(i)

Increase in temperature of water

(ii)

Decrease in temperature of water

(iii)

Less exposed surface area of water

(iv)

Adding common salt to water
Q-4 The state of matter which has no definite shape is called

(i)

solid

(ii)

gas

(iii)

water

(iv)

liquid
Q-5 The process by which a liquid changes into a gaseous state is called

(i)

evaporation

(ii)

freezing

(iii)

condensation

(iv)

sublimation
Chapter-7   Pure Substances and Separation of Mixture
Q-1 Fill in the blanks
(1) Components retain their properties in a ____________.
(2) Compounds have ____________ melting points.
(3) Sugarcane juice is a mixture of ____________ water and many other substances
(4) Separation of components is done to obtain a ____________ substance.
(5) Boiling point of pure water is ____________ than that of impure water.
Q-2 State True and False
(1) A pure substance has a fixed melting and boiling point
(2) Elements are pure substances.
(3) Separation of components of a mixture is a useful process.
(4) Rocks are pure substances.
(5) Tap water and pond water are alike.
Q-3 Match the following:
Q-4 Very short answer type questions
(1) What is mixture?
(2) Name the method used to separate husk from Wheat.
(3) What is the drawback of evaporation?
(4) What type of mixtures are separated by evaporation?
(5) Describe the method to obtain pure salt from rock salt.
Q-5 Short answer type questions
(1) Give two examples of each of the following types of mixture: (a) Solid – Solid (b) Solid – Liquid (c) Liquid – Gas
(2) Write the composition and use of each of the following: (a) Brass (b) Bronze (c) Solder
(3) Write the characteristics of mixture.
(4) Write the opposite process of condensation.
(5) How will you separate pure water from a solution?
Q-6 Long answer type questions
(1)  Classify the following into element, mixture and compound: (a) Sodium (b) Soil (c) Sugar solution (d) Silver (e) Calcium carbonate
(2) Write the four differences between mixture and compound.
(3) Write the definitions of the following. (a) Alloy (b) Homogeneous mixture (c) Impure substance (d) Solution (e) Solute (f) Solvent
(4) Name the property of the component used for separating each of the following: (a) Salt and Camphor (b) Wheat and husk (c) Iron fillings and sulphur
(5) Why do we need to separate different components of a mixture? Give two examples.
Multiple Choice Questions
Q-1 Threshing is done by-

(i)

beating

(ii)

bullocks

(iii)

machines

(iv)

all of these

Q-2 Filtration is a method to separate the components of a

(i)

solution

(ii)

mixture of a liquid and an insoluble substance

(iii)

both (a) and(b)

(iv)

pure substance
Q-3 Which method is used to separate pebbles and stones from sand?

(i)

hand picking

(ii)

winnowing

(iii)

sieving

(iv)

all of these
Q-4 The components of a solution (say sugar in water) can be separated by-

(i)

filtration

(ii)

evaporation

(iii)

sedimentation

(iv)

decantation
Q-5 Sand from water is separated by-

(i)

sieving

(ii)

evaporation

(iii)

filtration

(iv)

sedimentation and decantation