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- 1. Multiple Choice
During evaporation, particles of a liquid change to vapours only:
(a) from the surface
(b) from the bulk
(c) from both surface and bulk
(d) neither from surface nor from bulk
- 2. Multiple Choice
Which of the following statements is incorrect?
(a) Matter is made up of particles
(b) Matter is continuous in nature
(c) Particles of matter are always in state of motion
(d) Particles of matter attract each other.
- 3. Multiple Choice
Which of the following is not a matter?
(a) Air
(b) Feeling of cold
(c) Dust
(d) Humidity
- 4. Multiple Choice
Which of the following will not undergo sublimation?
(a) Camphor
(b) Ammonium Chloride
(c) Iodine
(d) Sodium Chloride
- 5. Multiple Choice
On increasing the temperature of a gas
(a) its K.E increases
(b) its K.E decreases
(c) its gets converted into liquid
(d) its particles come closer to each other
- 6. Multiple Choice
Which of the following is an example of a chemical change?
(a) Boiling water
(b) Burning wood
(c) Melting ice
(d) Dissolving sugar in water
- 7. Multiple Choice
What is the process of changing a solid directly into a gas called?
(a) Melting
(b) Freezing
(c) Sublimation
(d) Condensation
- 8. Multiple Choice
Which of the following is a physical property of matter?
(a) Flammability
(b) Density
(c) Reactivity
(d) Ability to rust
- 9. Multiple Choice
Which one of the following sets of phenomena would increase on raising the temperature?
(a) Diffusion, evaporation, compression of gases
(b) Evaporation, compression of gases, solubility
(c) Evaporation, diffusion, expansion of gases
(d) Evaporation, solubility, diffusion, compression of gases
- 10. Multiple Choice
A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement?
(a) water, air, wind
(b) oxygen, water, sugar
(c) air, sugar, oil
(d) salt, juice, air
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