Fill in the blanks:

(a) Evaporation takes place at_ temperature.

(b) _process is just the reverse of melting.

(c) _ is a process that involves the direct conversion of a solid into its vapour on heating.

(d) The temperature at which a solid convert into a liquid is called its_

(e) The smallest unit of matter that exists freely ni nature is called_

(f) Molecules of a substance are always in a state of_ and so they possess _

(g) Inter-molecular space is maximum in _less in _and the least in _

(h) Inter-molecular force of attraction is maximum in_less in _and the least in ___

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Solution

a) Evaporation takes place at all temperature.

(b) Freezing process is just the reverse of melting.

(c) Vaporization is a process that involves the direct conversion of a solid into its vapour on heating.

(d) The temperature at which a solid convert into a liquid is called its melting point

(e) The smallest unit of matter that exists freely in nature is called atom

(f) Molecules of a substance are always in a state of random motion and so they possess kinetic energy.

(g) Inter-molecular space is maximum in gas less in liquid and the least in solid.

(h) The inter-molecular force of attraction is maximum in solid less in liquid and the least in gas.

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Similar questions

Select the correct alternative:

(a) The inter-molecular force is maximum in :

(i) solids (ii) gases

(iii) liquids (iv) none of the above.

(b) The inter-molecular space is maximum in :

(i) liquids (ii) solids

(iii) gases (iv) none of the above.

(i) gases (ii) liquids

(iii) solids (iv) none of the above

(d) The molecules move only within the boundary of :

(i) liquids (ii) gases

(iii) solids (iv) none of the above

(e) The temperature at which a liquid gets converted into its vapour state is called its :

(i) melting point (ii) boiling point

(iii) dew point (iv) freezing point

(f) Rapid conversion of water into steam is are an example of:

(i) evaporation (ii) freezing

(ii) melting (iv) vaporization

(g) Evaporation takes place from the :

(i) surface of liquid

(ii) throughout the liquid

(iii) mid-portion of the liquid

(iv) bottom of the liquid

(h) Boiling takes place from:

(i) the surface of the liquid

(ii) throughout the liquid

(iii) mid-portion of liquid

(iv) none of the above

The process by which a solid directly converts into its vapour state is called ___ .

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