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States Of Matter : Class 9 Science MCQ Practice Questions & Answers (Hindi) - ObjectiveMcq

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PracticeClass 9 ScienceChemistryStates Of Matter

States Of Matter in Class 9 Science : Practice MCQ Questions & Answers with Explanations

8 practice sets · Page 1 of 1

Class 9 ScienceMediumChemistryStates Of MatterEvaporation

1.

What is the main cause of evaporation?

A

Decrease in temperature

B

Increase in pressure

C

Increase in temperature

D

Decrease in volume

Correct Answer:

C — Increase in temperature

Explanation:

Higher temperature increases particle energy, causing evaporation.

Class 9 ScienceMediumChemistryStates Of MatterBoiling Point

2.

What is the boiling point of water?

A

0°C

B

100°C

C

50°C

D

200°C

Correct Answer:

B — 100°C

Explanation:

Water boils at 100°C under standard atmospheric pressure.

Class 9 ScienceMediumChemistryStates Of MatterCondensation

3.

Which of the following processes involves the change of gas into a liquid?

A

Evaporation

B

Freezing

C

Condensation

D

Melting

Correct Answer:

C — Condensation

Explanation:

Condensation is the process in which gas changes into liquid on cooling.

Class 9 ScienceMediumChemistryStates Of MatterPlasma

4.

What is plasma?

A

A solid state of matter

B

A liquid state of matter

C

A gaseous state with no particles

D

A state of matter with charged particles

Correct Answer:

D — A state of matter with charged particles

Explanation:

Plasma is an ionized state of matter containing charged particles.

Class 9 ScienceMediumScience ChemistryStates Of Matter

5.

Which of the following substances can exist in all three states of matter?

A

Nitrogen

B

Oxygen

C

Water

D

Carbon dioxide

Correct Answer:

C — Water

Explanation:

Water exists as ice, liquid water, and steam under different conditions.

Class 9 ScienceMediumScience ChemistryStates Of Matter

6.

What is the process of a solid turning directly into a gas called?

A

Freezing

B

Melting

C

Sublimation

D

Condensation

Correct Answer:

C — Sublimation

Explanation:

Sublimation is the direct conversion of a solid into a gas without passing through the liquid state.

Class 9 ScienceMediumChemistryStates Of MatterSublimation

7.

What is sublimation?

A

Solid to gas

B

Gas to solid

C

Liquid to solid

D

Liquid to gas

Correct Answer:

A — Solid to gas

Explanation:

Sublimation is the direct change of a substance from solid to gas.

Class 9 ScienceMediumChemistryStates Of Matter

8.

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

A

Solid

B

Liquid

C

Gas

D

Plasma

Correct Answer:

B — Liquid

Explanation:

Liquids have a definite volume but take the shape of their container.