Class 9 Practice Level 3 – Set 1 - Matter in Our Surrounding

Total questions: 15

Which factor does not increase the rate of evaporation?

Topic: Evaporation

Higher temperature

Larger surface area

Lower humidity

Less wind speed

None

The kinetic energy of particles is highest in which state of matter?

Topic: States of Matter

Solid

Liquid

Gas

Plasma

None

When water freezes, its:

Topic: Freezing point

Temperature increases

Temperature decreases

Volume decreases

Volume increases

None

What happens to the pressure of a gas if its volume is decreased while keeping the temperature constant?

Topic: Gas Laws

Pressure increases

Pressure decreases

Pressure remains the same

Pressure becomes zero

None

Which of the following states of matter is most compressible?

Topic: Compressibility

Solid

Liquid

Gas

Plasma

None

The process of a liquid changing into a gas at its boiling point is called:

Topic: Boiling

Evaporation

Condensation

Freezing

Boiling

None

Which of the following statements is true about liquids?

Topic: Properties of Liquids

They have a fixed shape but no fixed volume

They are highly compressible

They have a definite volume but take the shape of their container

Their particles are arranged in a regular pattern

None

Which state of matter has the highest density?

Topic: Density

Solid

Liquid

Gas

Plasma

None

The rate of evaporation increases with:

Topic: Evaporation

Decrease in temperature

Increase in humidity

Decrease in wind speed

Increase in surface area

None

10.

Which process involves a change of state from gas to solid without passing through the liquid state?

Topic: Changes of State

Sublimation

Deposition

Condensation

Evaporation

None

11.

According to the kinetic theory of gases, the pressure exerted by a gas is due to:

Topic: Kinetic Theory

The collisions of gas molecules with each other

The collisions of gas molecules with the walls of the container

The attraction between gas molecules

The repulsion between gas molecules

None

12.

Diffusion occurs fastest in:

Topic: Diffusion

Solids

Liquids

Gases

Plasma

None

13.

The latent heat of fusion is the heat energy required to:

Topic: Latent Heat

Convert 1 kg of solid to liquid at its melting point

Convert 1 kg of liquid to gas at its boiling point

Raise the temperature of 1 kg of substance by 1°C

Convert 1 kg of gas to solid at its freezing point

None

14.

The latent heat of vaporization is:

Topic: Latent Heat

The heat energy required to change 1 kg of liquid into gas at atmospheric pressure at its boiling point

The heat energy required to change 1 kg of solid into liquid at its melting point

The heat energy required to raise the temperature of 1 kg of a substance by 1°C

The heat energy required to change 1 kg of gas into solid at its freezing point

None

15.

Which of the following properties is not characteristic of gases?

Topic: Gaseous State

They have definite volume

They are highly compressible

They fill their container completely

They have low density

None

1 out of 15

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Class 9 Practice Level 3 – Set 1 - Matter in Our Surrounding

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