Mock Test - 02 Matter in our Surroundings

Welcome to the ultimate mock test zone for Class 9 Science Chapter 1: Matter in Our Surroundings!
Get ready to test your understanding, challenge yourself, and strengthen your science concepts with our interactive online quizzes and practice tests.

In this chapter, you’ll explore the fascinating world of matter — its states, properties, and how it changes from solid to liquid to gas. Our mock tests are carefully designed according to the latest NCERT and CBSE Class 9 Science syllabus, ensuring that you practice exactly what matters most for your exams.

1. Which of the following is not correct about evaporation?

It is surface phenomenon.

it takes place at all temperatures.

It causes cooling as it takes heat from surroundings.

(d) Its rate decreases with decrease in humidity.

2. Which one of the following sets of phenomenon would increase on raising the temperature?

Diffusion, evaporation and compression of gases.

Evaporation, compression of gases and solubility of solid in liquid.

Evaporation, diffusion, expansion of gases and solubility of solid in liquid.

Evaporation, solubility of gas in liquid, diffusion and compression of gases.

The boiling point of diethylether, acetone and n-butyl alcohol are 35 °C, 56 °C and 118 °C respectively. Which one of the following represents their boiling points in kelvin scale?

306 K, 329 K, 391 K

308 K, 329 K, 392 K

308 K, 329 K, 391 K

328 K, 391 K, 307 K

4. Dry ice is

solid CO2.

water is solid state

non-volatile solid

liquid carbon dioxide.

5. Shivam visited an LPG unit and found that the gas can be liquified at specific conditions of temperature and pressure. Help him to identify the correct set of conditions.

(a) High temperature and high pressure.

(b) Low temperature and low pressure.

(d) High temperature and low pressure.

6. Which of the following cannot be separated by sublimation?

Iodine and NaCl.

Iodine and Ammonium chloride.

Camphor and Sodium chloride.

Naphthalene and Sand.

7. Cooking gas is known as LPG (Liquified Petroleum Gas). How can a gas be liquified? [CBSE T.E.R.M.*]

when pressure is applied to the gas.

when temperature of the gas is increased.

when gas is mixed with a liquid substitute.

when the force of attraction between particle is reduced.

8. During summer, water kept in earthen pot becomes cool due to phenomenon of

Diffusion

Transpiration

Distillation

Evaporation

9. The temperature at which vapour pressure of liquid becomes equal to atmospheric pressure is called

melting point.

boiling point

ignition temperature.

sublimation point

10. Which of the following will produce severe burns ?

Cold water

Hot water

Boiling water

Steam

11. In the following Questions, the Assertion (A) and Reason (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:

Assertion: Dry ice is solid CO₂.

Reason: Dry ice is same as ice.

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

Assertion is true but the Reason is false.

The statement of the Assertion is false but the Reason is true.

12. A student adds ink to water. The ink particles spread throughout the water. Which property of water allows other particles to diffuse in ?

fixed volume

inability to compress

intermolecular spaces

ability to change shape

13.

Which of the following is correct?

A solid has fixed volume, liquid does not

A solid has definite density, liquid does not

A solid has definite shape, liquid does not

A solid has fixed mass, liquid does not.

14.

Which of the following is not an example of matter?

Air

vacuum

mud

sun

15.

(b) Sublimation involves solid into vapours and vapours back into solid directly.

Increase in temperature of water.

Decrease in wind speed.

Decrease in surface area of water.

Adding sugar to water.

16. Choose the correct statement out of the following.

Conversion of solid into vapours without becoming liquid is called evaporation.

Conversion of vapours into solid without becoming liquid is called sublimation.

Conversion of solid into liquid is called sublimation.

Conversion of liquid into vapours is called fusion.

17. Humidity is amount of

water vapours in air.

ice in air.

liquid water in air.

water vapours and liquid water in air

18. Which of the following has minimum kinetic energy ?

Particles of ice below 0 °C.

Particles of water at 0 °C .

Particles of water at 100 °C.

Particles of steam at 100 °C.

19. Clothes do not dry quickly when there is more humidity in air. What explains the phenomenon? [CBSE T.E.R.M.*]

high humidity decreases the rate of evaporation.

high humidity increases the rate of evaporation.

high humidity decreases the rate of condensation.

high humidity increases the rate of condensation.

20. In the following Questions, the Assertion (A) and Reason (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:

Assertion: Cold drink bottle kept in freezer breaks.

Reason: CO₂ gas exerts high pressure on the walls of bottle when water changes into ice.

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

Assertion is true but the Reason is false.

The statement of the Assertion is false but the Reason is true.

21. During summer, water kept in earthen pot becomes cool due to phenomenon of

Diffusion

transpiration

Distillation

Evaporation

22. Latent heat of fusion is amount of

heat energy required to change 1 kg solid into liquid completely at its melting point.

heat energy required to convert 1 kg solid into liquid at room temperature.

heat energy required to change 1 g of solid into liquid completely.

heat energy required to change 1 kg of solid into liquid at any temperature.

23. Which of the following is not correct?

Matter is made up particles

particles of matter attract each other

particles of gases and liquids are continuously moving

particles of matter are always in state of motion

24.

The melting point of ice is 0°C. At this temperature, both ice and water exist. However, the particles of water at 0°C have more energy than

particles of ice at 0°C. What explains this? [CBSE T.E.R.M.*]

at melting point, water particles absorb more heat and change into ice.

at melting point, ice particles raise their temperature and change to water.

at melting point, water particles raise their temperature and change into ice.

at melting point, ice particles absorb latent heat and change into water particles.

25. In the following Questions, the Assertion (A) and Reason (R) have been put forward. Read both the statements carefully and choose the correct alternative from the following:

Assertion: Ice sinks into water.

Reason: Ice has lower density than water.

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

Assertion is true but the Reason is false.

The statement of the Assertion is false but the Reason is true.

26. The image shows two changes.

Identify process X and Y. [CBSE T.E.R.M.*]

Process X – freezing; Process Y – melting

Process X – melting; Process Y – evaporation

Process X – condensation; Process Y – melting

Process X – evaporation; Process Y – condensation

27.

Seema took a 100 ml beaker and filled half the beaker with water and marked the level of water. She dissolved some salt with the help of a glass

rod and recorded water level again. Choose the correct observation related to above activity.

The water level increases appreciably

The water level decreases

The water level remains the same

There is little increase in water level.

28. The melting points of four solid A, B, C and D are 380K, 54K, 290K and 1600K. The forces of attraction are in order of

A < B < C < D

B < C < D < A

b < c < a < d

c < b < a < d

29. Choose the incorrect statement.

We should wear cotton clothes in summer.

Plasma is superenergetic and superexcited particle.

B.E.C. (Bose-Einstein Condensate) are formed by cooling gas of very low density at super low temperature.

Terylene can absorb sweat more than cotton.

30. When an inflated balloon is kept in oven at 50°C

it will expand.

it will shrink

it will remain as it is

kinetic energy of particle will decrease

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