Online test of Chapter 1 Matter in our Surrounding 1 Science| Class 9th

Questions :

1. 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. 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. Which of the following is not a matter?
(a) Air
(b) Feeling of cold
(c) Dust
(d) Humidity

4. Which of the following will not undergo sublimation?
(a) Camphor
(b) Ammonium Chloride
(c) Iodine
(d) Sodium Chloride

5. 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. The latent heat of vaporisation of water is
a. 2.26 x 105 J kg-1
b. 22.6 x 105 J kg-1
c. 22.6 x 106 J kg-1
d. 6.22 x 105 J kg-1

7. The interparticle forces are the strongest in:
(a) Ammonia
(b) Ethyl alcohol
(c) Carbon dioxide
(d) Sodium bromide

8. 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

9. Select the substance which does not undergo sublimation
(a) Common salt
(b) Naphthalene
(c) Ammonium chloride
(d) Camphor

10. 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

Chapter 1 Matter in our Surroundings Quiz 1| Class 9th

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