ICSE Class 8 Chemistry by Pavan | Practice Test to Test Your Knowledge
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ICSE Class 8 Chemistry

ICSE Class 8 Chemistry

Thorough mock test covering Matter, Elements and Compounds, and Chemical Reactions. Features theory questions and practical applications.

2025-07-19
Pavan Pavan
ICSE Chemistry Class 8 Grade 8

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

Which of the following is a main postulate of the Kinetic Molecular Theory of Matter?

A
The particles are always at rest.
B
The particles are in constant motion and collide with each other.
C
Particles are only found in solids.
D
Particles move in a straight line until they hit the surface.

What does the Kinetic Molecular Theory explain about the behavior of gases?

A
Gas particles do not move.
B
Gas particles are closely packed together.
C
Gas particles are in constant random motion and exert pressure.
D
Gas particles attract each other.

Which of the following correctly explains the change of state of matter according to the Kinetic Molecular Theory?

A
Particles move more slowly when heated.
B
When heated, particles move faster, causing a change in the state.
C
Particles do not change their speed during phase change.
D
The particles always remain stationary during a phase change.

What happens to the inter-particle space and inter-particle attraction when a solid melts into a liquid?

A
The inter-particle space decreases and inter-particle attraction increases.
B
The inter-particle space increases and inter-particle attraction decreases.
C
The inter-particle space and attraction both increase.
D
The inter-particle space and attraction both decrease.

What happens when a gas is cooled down according to the Kinetic Molecular Theory?

A
Gas particles move faster, leading to expansion.
B
Gas particles slow down and the gas condenses into a liquid.
C
Gas particles speed up, causing the gas to turn into a solid.
D
Gas particles stop moving.

The transition from liquid to gas is known as:

A
Fusion
B
Evaporation
C
Boiling
D
Sublimation

Which of the following processes involves the change of state from gas to solid?

A
Condensation
B
Sublimation
C
Deposition
D
Freezing

What happens when the inter-particle attraction in a substance is greater than its kinetic energy?

A
The substance remains in the solid state.
B
The substance undergoes melting.
C
The substance turns into a gas.
D
The substance evaporates.

Which of the following is a true statement about the Law of Conservation of Mass?

A
Mass can be created or destroyed during a chemical reaction.
B
Mass remains constant during a chemical reaction.
C
Mass is lost during an exothermic reaction.
D
Mass increases in a chemical reaction.

Which of the following is an example of the Law of Conservation of Mass?

A
When hydrogen reacts with oxygen to form water, the total mass of the reactants equals the total mass of the products.
B
When a substance evaporates, mass is lost.
C
In a chemical reaction, some mass is destroyed.
D
Mass increases when a substance is heated.

What is the general principle of the Kinetic Molecular Theory of Matter?

A
The particles in a substance are always in random motion.
B
The particles of a gas attract each other strongly.
C
The particles in a solid move freely and rapidly.
D
The particles in matter are stationary.

What occurs during the process of condensation?

A
A gas changes into a liquid.
B
A solid changes into a liquid.
C
A liquid changes into a solid.
D
A liquid changes into a gas.

Which of the following is an example of a chemical reaction that demonstrates the Law of Conservation of Mass?

A
Burning of wood
B
Melting of ice
C
Boiling of water
D
Mixing salt in water

Which of the following statements is correct about the change of state?

A
Particles move faster during freezing.
B
The attraction between particles increases during melting.
C
The kinetic energy of particles increases during evaporation.
D
Particles move slower during sublimation.

What is the effect of increasing temperature on the kinetic energy of particles?

A
The kinetic energy decreases.
B
The kinetic energy remains constant.
C
The kinetic energy increases.
D
There is no effect on kinetic energy.

Which of the following best describes the process of melting?

A
The particles gain energy and move from fixed positions to a more fluid state.
B
The particles lose energy and become tightly packed.
C
The particles remain stationary in their fixed positions.
D
The particles move randomly and lose attraction.

What happens to the volume of a gas when its temperature is increased, according to the Kinetic Molecular Theory?

A
The volume decreases.
B
The volume remains constant.
C
The volume increases.
D
The volume becomes zero.

Which of the following statements is true about the Law of Conservation of Mass?

A
Mass is lost during a chemical reaction.
B
Mass is created during a chemical reaction.
C
The total mass of reactants is equal to the total mass of products.
D
Mass can be destroyed during a reaction.

When a substance undergoes combustion, the total mass of products will be:

A
Greater than the reactants.
B
Equal to the mass of reactants.
C
Less than the reactants.
D
Unpredictable.

Which process is described as the transition from solid to liquid?

A
Fusion
B
Condensation
C
Sublimation
D
Freezing

Which of the following explains the Law of Conservation of Mass in a closed system?

A
Mass is conserved in both physical and chemical changes.
B
Mass is lost during chemical changes.
C
Only chemical reactions conserve mass.
D
Mass is gained in physical changes.

What is the final phase of matter when a gas is cooled down and condenses into liquid?

A
Liquid
B
Gas
C
Solid
D
Plasma

Which of the following demonstrates the Law of Conservation of Mass during a chemical reaction?

A
The mass of the products equals the mass of the reactants.
B
The mass of the reactants decreases.
C
The mass of the products decreases.
D
Mass is created during the reaction.

Which is the correct definition of a chemical reaction according to the Law of Conservation of Mass?

A
The mass of products equals the mass of reactants in a closed system.
B
Mass is lost during reactions.
C
The mass of reactants is greater than the products.
D
The products have less mass.

Which of the following is an example of an irreversible physical change?

A
Boiling water
B
Sublimation of iodine
C
Freezing water
D
Burning paper

Which of the following describes a physical change?

A
The identity of the substance remains the same.
B
The substance forms a new substance.
C
Energy is released.
D
The mass of the substance changes.

Which of the following is an example of a physical change?

A
Melting ice
B
Burning wood
C
Rusting of iron
D
Cooking an egg

Which of the following demonstrates the Law of Conservation of Mass during a physical change?

A
The mass remains the same before and after the change.
B
The mass decreases.
C
Mass is created.
D
The mass increases.

What happens to the mass of a substance during a chemical reaction?

A
The mass remains constant.
B
The mass decreases.
C
The mass increases.
D
The mass is lost.

Which of the following examples best illustrates the Law of Conservation of Mass?

A
When magnesium reacts with oxygen, the total mass of the products equals the total mass of the reactants.
B
In a burning candle, the mass is lost.
C
When water boils, the mass increases.
D
In a chemical reaction, mass can be created.