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Class 9 Chemistry Chapter 1 Matter in Our Surroundings MCQs

Class 9 chemistry MCQs with answers are provided here for chapter 1 Matter in Our Surroundings. These MCQs are based on CBSE board curriculum and correspond to the most recent Class 9 chemistry syllabus. By practicing these Class 9 Multiple choice questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 9 Annual examinations as well as other entrance exams such as CTET and KVS. Set of 25 multiple-choice questions (MCQs) based on the topic "Matter in Our Surroundings" that are commonly covered in CBSE Class 9. Please note that the answers are provided at the end.


1. Which of the following is the smallest unit of matter?

a) Atom

b) Molecule

c) Particle

d) Element


2. The process of changing a substance from a solid to a liquid state is called:

a) Melting

b) Freezing

c) Evaporation

d) Condensation


3. The temperature at which a substance changes from a liquid to a gas is called:

a) Boiling point

b) Melting point

c) Freezing point

d) Condensation point


4. The process of changing a substance directly from a solid to a gas state is called:

a) Sublimation

b) Evaporation

c) Condensation

d) Melting


5. The process of changing a gas into a liquid is called:

a) Condensation

b) Evaporation

c) Sublimation

d) Freezing


6. The phenomenon of a substance absorbing heat and changing from a liquid to a gas at its boiling point is called:

a) Evaporation

b) Melting

c) Boiling

d) Sublimation


7. The SI unit of temperature is:

a) Kelvin

b) Celsius

c) Fahrenheit

d) Rankine


8. Which of the following is not a physical change?

a) Boiling of water

b) Rusting of iron

c) Melting of ice

d) Dissolving sugar in water


9. The process of changing a gas directly into a solid without going through the liquid state is called:

a) Deposition

b) Condensation

c) Evaporation

d) Sublimation


10. The process by which a liquid changes into a solid is called:

a) Melting

b) Sublimation

c) Freezing

d) Evaporation


11. The state of matter with the least kinetic energy is:

a) Solid

b) Liquid

c) Gas

d) Plasma


12. The phenomenon by which particles of a gas escape from the surface of a liquid into the air is called:

a) Condensation

b) Sublimation

c) Evaporation

d) Freezing


13. The process of converting a gas into a liquid by cooling is called:

a) Melting

b) Freezing

c) Boiling

d) Condensation


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

a) Burning of wood

b) Cooking an egg

c) Rusting of iron

d) Boiling water


15. The interconversion of states of matter is governed by:

a) Boyle's Law

b) Newton's Law

c) Archimedes' Principle

d) Kinetic Molecular Theory


16. The process by which a liquid changes into a gas at any temperature is called:

a) Boiling

b) Freezing

c) Melting

d) Sublimation


17. Which state of matter has the highest kinetic energy?

a) Solid

b) Liquid

c) Gas

d) Plasma


18. The particles of matter are in constant motion. This motion is more in:

a) Solids

b) Liquids

c) Gases

d) All states equally


19. The process of changing a gas directly into a solid is called:

a) Melting

b) Freezing

c) Sublimation

d) Condensation



20. The process of a solid changing directly into a gas is called:

a) Evaporation

b) Boiling

c) Sublimation

d) Freezing


21. Which of the following is a chemical change?

a) Ice melting into water

b) Dissolving salt in water

c) Burning of paper

d) Condensation of water vapor


22. Which of the following is a characteristic property of a substance?

a) Color

b) Mass

c) Volume

d) Temperature


23. The SI unit of pressure is:

a) Pascal

b) Newton

c) Joule

d) Kelvin


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

a) Digestion of food

b) Corrosion of metal

c) Ripening of fruit

d) Melting of ice


25. The process of a gas changing directly into a solid is called:

a) Evaporation

b) Freezing

c) Sublimation

d) Condensation


Answers:

1. a) Atom

2. a) Melting

3. a) Boiling point

4. a) Sublimation

5. a) Condensation

6. c) Boiling

7. a) Kelvin

8. b) Rusting of iron

9. a) Deposition

10. c) Freezing

11. a) Solid

12. c) Evaporation

13. d) Condensation

14. d) Boiling water

15. d) Kinetic Molecular Theory

16. a) Boiling

17. c) Gas

18. c) Gases

19. c) Sublimation

20. c) Sublimation

21. c) Burning of paper

22. d) Temperature

23. a) Pascal

24. d) Melting of ice

25. c) Sublimation


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