Extra 40 MCQs with answers from the chapter:1 "Matter in Our Surroundings" for Class 9 CBSE Science:-
Multiple Choice Questions (MCQs)
1. Matter is made up of
A) Atoms
B) Molecules
C) Both A and B
D) None of the above
Answer: C) Both A and B
2. Which of the following is not a state of matter?
A) Solid
B) Liquid
C) Gas
D) Energy
Answer: D) Energy
3. The process of conversion of a liquid into vapours at any temperature below its boiling point is called
A) Boiling
B) Condensation
C) Evaporation
D) Sublimation
Answer: C) Evaporation
4. The interparticle force of attraction is maximum in
A) Solids
B) Liquids
C) Gases
D) Plasma
Answer: A) Solids
5. The ability of gases to be compressed is due to
A) High kinetic energy
B) Large intermolecular spaces
C) Weak intermolecular forces
D) All of the above
Answer: D) All of the above
6. The SI unit of temperature is
A) Celsius
B) Fahrenheit
C) Kelvin
D) Joule
Answer: C) Kelvin
7. Which state of matter has a definite shape and definite volume?
A) Solid
B) Liquid
C) Gas
D) Plasma
Answer: A) Solid
8. The change of a solid directly into a gas without passing through the liquid state is called
A) Evaporation
B) Condensation
C) Boiling
D) Sublimation
Answer: D) Sublimation
9. Which of the following is an example of sublimation?
A) Ice melting
B) Water boiling
C) Camphor disappearing
D) Sugar dissolving
Answer: C) Camphor disappearing
10. The temperature at which a liquid changes into a gas at atmospheric pressure is called
A) Melting point
B) Boiling point
C) Freezing point
D) Condensation point
Answer: B) Boiling point
11. Which of the following factors affect evaporation?
A) Temperature
B) Surface area
C) Humidity
D) All of the above
Answer: D) All of the above
12. Which process is used to separate common salt from seawater?
A) Evaporation
B) Filtration
C) Distillation
D) Sedimentation
Answer: A) Evaporation
13. Dry ice is solid
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: B) Carbon dioxide
14. The melting point of ice is
A) 0°C
B) 100°C
C) 273 K
D) Both A and C
Answer: D) Both A and C
15. The boiling point of water in Kelvin is
A) 100 K
B) 273 K
C) 373 K
D) 473 K
Answer: C) 373 K
16. The phenomenon in which a liquid changes into vapours without boiling is called
A) Boiling
B) Evaporation
C) Sublimation
D) Condensation
Answer: B) Evaporation
17. Which gas is known as the fourth state of matter?
A) Neon
B) Plasma
C) Carbon dioxide
D) None of these
Answer: B) Plasma
18. The process of conversion of a gas into a liquid is called
A) Evaporation
B) Boiling
C) Condensation
D) Sublimation
Answer: C) Condensation
19. Which of the following statements is true?
A) Gases do not flow
B) Solids have a definite shape
C) Liquids have a fixed shape
D) Gases are incompressible
Answer: B) Solids have a definite shape
20. The process of heating a solid to convert it into liquid is known as
A) Evaporation
B) Boiling
C) Melting
D) Condensation
Answer: C) Melting
21. The boiling point of a liquid depends on
A) Atmospheric pressure
B) Mass of the liquid
C) Volume of the liquid
D) Density of the liquid
Answer: A) Atmospheric pressure
22. The property of taking the shape of the container is seen in
A) Solids
B) Liquids
C) Gases
D) Both B and C
Answer: D) Both B and C
23. Which of the following has the highest kinetic energy?
A) Solid
B) Liquid
C) Gas
D) Plasma
Answer: D) Plasma
24. Which state of matter is affected most by changes in temperature and pressure?
A) Solids
B) Liquids
C) Gases
D) All are equally affected
Answer: C) Gases
25. Which of the following does not undergo sublimation?
A) Iodine
B) Naphthalene
C) Sugar
D) Camphor
Answer: C) Sugar
26. A gas has no fixed
A) Shape
B) Volume
C) Both A and B
D) None
Answer: C) Both A and B
27. The rate of evaporation increases with
A) Increase in temperature
B) Increase in surface area
C) Increase in wind speed
D) All of the above
Answer: D) All of the above
28. Which of the following is an example of condensation?
A) Water vapor forming clouds
B) Ice melting
C) Water boiling
D) Salt dissolving in water
Answer: A) Water vapor forming clouds
29. The intermolecular force of attraction is weakest in
A) Solids
B) Liquids
C) Gases
D) Plasmas
Answer: C) Gases
30. The phenomenon in which water droplets form on a cold glass surface is called
A) Sublimation
B) Condensation
C) Boiling
D) Melting
Answer: B) Condensation
31. Which is an example of a fluid?
A) Ice
B) Water
C) Oxygen gas
D) Both B and C
Answer: D) Both B and C
32. Diffusion is fastest in
A) Solids
B) Liquids
C) Gases
D) Plasma
Answer: C) Gases
33. Which of the following will evaporate faster?
A) Hot water
B) Cold water
C) Ice
D) None
Answer: A) Hot water
34. The process used to separate two miscible liquids is
A) Filtration
B) Distillation
C) Evaporation
D) Sublimation
Answer: B) Distillation
35. Fog is an example of
A) Gas
B) Liquid
C) Solid
D) Liquid dispersed in gas
Answer: D) Liquid dispersed in gas
36. Which of the following statements about solids is true?
A) They have a fixed shape and volume
B) They take the shape of the container
C) They can flow like liquids
D) They have large intermolecular spaces
Answer: A) They have a fixed shape and volume
37. Why do liquids flow but solids do not?
A) Liquids have strong intermolecular forces
B) Liquids have weak intermolecular forces
C) Solids have large intermolecular spaces
D) Solids have high kinetic energy
Answer: B) Liquids have weak intermolecular forces
38. The process by which a solid changes directly into a gas is called
A) Condensation
B) Evaporation
C) Sublimation
D) Freezing
Answer: C) Sublimation
39. Which of the following is an example of expansion on heating?
A) A metal ring expanding
B) Water freezing
C) Ice melting
D) Water boiling
Answer: A) A metal ring expanding
40. Which property of gases allows them to be compressed easily?
A) Strong intermolecular forces
B) Large intermolecular spaces
C) High density
D) Fixed shape and volume
Answer: B) Large intermolecular spaces
