Chapter: Matter in Our Surroundings – MCQs
1. Which of the following is not a characteristic of particles of matter?
a) They have spaces between them
b) They are continuously moving
c) They are stationary
d) They attract each other
2. Which state of matter has the maximum interparticle space?
a) Solid
b) Liquid
c) Gas
d) Plasma
3. The boiling point of water is:
a) 0°C
b) 50°C
c) 100°C
d) 120°C
4. The phenomenon of change of a liquid into vapour at any temperature below its boiling point is called:
a) Condensation
b) Boiling
c) Evaporation
d) Freezing
5. Which of the following will show the highest rate of diffusion?
a) Oxygen gas
b) Salt in water
c) Ink in water
d) Sand in air
6. Latent heat of vaporisation is:
a) The heat required to raise the temperature by 1°C
b) The heat required to convert solid into liquid
c) The heat required to convert liquid into gas without temperature change
d) The heat released during freezing
7. Which state of matter is incompressible and has fixed shape?
a) Solid
b) Liquid
c) Gas
d) Plasma
8. Sublimation is the process where a substance:
a) Directly changes from solid to liquid
b) Directly changes from solid to gas
c) Directly changes from gas to liquid
d) Changes from liquid to gas
9. The temperature at which a solid starts melting is called:
a) Boiling point
b) Melting point
c) Freezing point
d) Condensation point
10. Which of the following can be compressed easily?
a) Ice
b) Water
c) Steam
d) Milk
11. Which of the following is a process of gaining heat?
a) Condensation
b) Freezing
c) Melting
d) Solidification
12. The rate of evaporation increases with:
a) Decrease in temperature
b) Decrease in surface area
c) Increase in humidity
d) Increase in wind speed
13. Which state of matter takes both the shape and volume of its container?
a) Solid
b) Liquid
c) Gas
d) None
14. The SI unit of pressure is:
a) Newton
b) Pascal
c) Joule
d) Kelvin
15. Which of the following shows sublimation?
a) Water
b) Camphor
c) Sugar
d) Milk
16. Why does a gas fill the entire container in which it is placed?
a) Due to strong intermolecular force
b) Due to weak intermolecular force and free movement of particles
c) Due to high density
d) Due to fixed shape
17. What happens to the temperature of a substance during the change of state?
a) It increases
b) It decreases
c) It remains constant
d) It becomes zero
18. Which one has maximum kinetic energy?
a) Particles of a solid
b) Particles of a liquid
c) Particles of a gas
d) Particles of a plasma
19. Which of the following is not a factor affecting evaporation?
a) Temperature
b) Surface area
c) Humidity
d) Colour of the liquid
20. Which state of matter has the least kinetic ene
rgy?
a) Solid
b) Liquid
c) Gas
d) Plasma
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