Class 9 Practice Level 1 - Matter in Our Surrounding

Total questions: 40

Which of the following is the process of a solid changing directly into a gas?

Topic: States of Matter

Condensation

Freezing

Sublimation

Melting

None

What state of matter has a definite shape and volume?

Topic: States of Matter

Solid

Liquid

Gas

Plasma

None

What happens to the particles of a substance when it melts?

Topic: Changes of State

They move closer together

They move further apart

They stay in place

They move randomly

None

Which state of matter has neither a definite shape nor a definite volume?

Topic: States of Matter

Solid

Liquid

Gas

Plasma

None

What is the process of a liquid changing into a gas called?

Topic: Evaporation

Condensation

Freezing

Melting

Evaporation

None

Which factor does not affect the rate of evaporation?

Topic: Evaporation

Temperature

Surface area

Humidity

Color

None

What is the process of a gas changing into a liquid called?

Topic: Condensation

Evaporation

Freezing

Melting

Condensation

None

What is the boiling point of water at sea level?

Topic: Boiling Point

50°C

100°C

150°C

200°C

None

At what temperature does water freeze?

Topic: Freezing point

0°C

50°C

100°C

-10°C

None

10.

What is the melting point of ice?

Topic: Melting

0°C

50°C

100°C

-10°C

None

11.

Which of the following substances undergoes sublimation?

Topic: Sublimation

Ice

Dry ice (solid CO₂)

Water

Salt

None

12.

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

Topic: Gas Pressure

Pressure increases

Pressure decreases

Pressure remains the same

Pressure becomes zero

None

13.

What happens to the boiling point of water at higher altitudes?

Topic: Boiling Point

Increases

Decreases

Remains the same

First increases, then decreases

None

14.

What happens to the temperature of a substance during the phase change?

Topic: Changes of State

It increases

It decreases

It remains constant

It fluctuates

None

15.

Which of the following is an example of a liquid turning into a gas at room temperature?

Topic: States of Matter

Boiling water

Evaporation of water from a pond

Melting of ice

Freezing of water

None

16.

Which of the following conditions is most likely to cause condensation?

Topic:Condensation

High temperature and high humidity

Low temperature and low humidity

High temperature and low humidity

Low temperature and high humidity

None

17.

When ice melts to form water, what type of change occurs?

Topic:Changes of State

Physical change

Chemical change

Both physical and chemical change

Neither physical nor chemical change

None

18.

Which of the following is true about the particles in a solid?

Topic:Particles in Matter

They move freely

They are packed closely together

They are far apart

They are randomly arranged

None

19.

Which of the following is true about liquids?

Topic: Properties of Liquids

They have a fixed shape

They have a fixed volume

They are highly compressible

They cannot flow

None

20.

Which of the following is true about gases?

Topic: Properties of Gases

They have a fixed shape

They have a fixed volume

They fill their container completely

They are incompressible

None

21.

Which state of matter has the highest density?

Topic: Density

Solid

Liquid

Gas

Plasma

None

22.

Which of the following factors increases the rate of evaporation?

Topic: Evaporation

Decrease in temperature

Increase in humidity

Increase in wind speed

Decrease in surface area

None

23.

Which process involves water changing from a liquid to a solid?

Topic: Freezing point

Melting

Boiling

Evaporation

Freezing

None

24.

Which of the following is not a physical change?

Topic: Physical Changes

Melting of ice

Boiling of water

Burning of paper

Dissolving sugar in water

None

25.

What is the melting point of ice in degrees Celsius?

Topic: Melting

0°C

32°C

100°C

212°C

None

26.

Which process involves a liquid changing into a gas at its boiling point?

Topic: Boiling

Evaporation

Condensation

Freezing

Boiling

None

27.

Which of the following processes requires the absorption of heat?

Topic: Temperature and Heat

Freezing

Condensation

Evaporation

Deposition

None

28.

In which state of matter do particles have the highest kinetic energy?

Topic: Kinetic Theory

Solid

Liquid

Gas

Plasma

None

29.

Which of the following involves a change from liquid to solid?

Topic: Changes of State

Condensation

Evaporation

Freezing

Melting

None

30.

Which of the following is a characteristic property of solids?

Topic: Properties of Solids

Indefinite shape and volume

Definite shape and volume

Definite shape but indefinite volume

Indefinite shape but definite volume

None

31.

Which state of matter has a definite volume but no definite shape?

Topic: Properties of Liquids

Solid

Liquid

Gas

Plasma

None

32.

Which of the following states of matter has neither a definite shape nor a definite volume?

Topic:Properties of Gases

Solid

Liquid

Gas

Plasma

None

33.

Which of the following factors increases the rate of diffusion?

Topic:Diffusion

Decreasing temperature

Decreasing surface area

Increasing temperature

Increasing the size of particles

None

34.

What happens to the particles of a substance when it changes from a solid to a liquid?

Topic:Changes of State

They lose energy and move closer together

They gain energy and move further apart

They stop moving

They become larger

None

35.

Which of the following increases the rate of evaporation?

Topic: Evaporation

Increasing humidity

Decreasing temperature

Increasing surface area

Decreasing surface area

None

36.

What is the term for the heat energy required to change a substance from a solid to a liquid without changing its temperature?

Topic: Latent Heat

Latent heat of fusion

Latent heat of vaporization

Specific heat capacity

Sensible heat

None

37.

What is the boiling point of water at sea level?

Topic: Boiling Point

50°C

90°C

100°C

150°C

None

38.

Which of the following substances undergoes sublimation?

Topic: Sublimation

Ice

Sodium chloride

Naphthalene

Sugar

None

39.

What happens to the temperature of a substance during freezing?

Topic: Freezing point

It increases

It decreases

It remains constant

It fluctuates

None

40.

Which of the following is an example of plasma?

Topic: Plasma

Water vapor

Neon lights

Ice

Liquid nitrogen

None

1 out of 40

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Class 9 Practice Level 1 - Matter in Our Surrounding

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