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  • Fill in the blanks: (a) Evaporation of a liquid at room temperature leads to a ——— effect.(b) At room temperature the forces of attraction between the particles of solid substances are ——— than those which exist in the gaseous state.

Fill in the blanks:

(a) Evaporation of a liquid at room temperature leads to a _______ effect.

(b) At room temperature the forces of attraction between the particles of solid substances are _______ than those which exist in the gaseous state.

(c) The arrangement of particles is less ordered in the_______ state. However, there is no order in the _______state.

(d)_______ is the change of solid state directly to vapour state without going through the _______ state.

(e) The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called _______.

Answers (1)

a) Cooling      

b) Stronger     

c) Liquid, Gaseous     

d) Sublimation , Liquid          

e) Evaporation

a) In process of evaporation, some molecules of liquid take energy from rest of the molecules and get converted in vapour. Therefore, the energy of remaining liquid decreases which leads to decrease in temperature.

Hence we have to fill the blank space by COOLING

b) The intermolecular force among the molecules of solids is maximum among all three states.
Force in solids are more than intermolecular force among the molecules of liquid.

On the same line intermolecular forces among the molecules of liquid is more than force between gas molecules.

Hence we have to fill the blank space by STRONGER.

c) In solids, particles are arranged in perfect order. In liquid, molecules are less ordered and in gases they are totally random.

Hence at the first place we have to fill LIQUID and in second space we have to fill the GASEOUS.

d) In the process of sublimation, solids change to gaseous state without going through the liquid state.

Hence first place is filled with sublimation and the second space is filled with liquid.

e) At every temperature of liquid, some molecules of liquid gets converted into vapour.

This process is called evaporation.

Hence we have to fill the space with evaporation.

Posted by

Gurleen Kaur

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