Question

7. Give reasons for the following:
(i) A liquid generally flows easily.
(ii) Ice at 0°C appears colder to the mouth than water at 0°C. Why?
(iii) Doctors advise to put strips of wet cloth on the forehead of a person having high temperature.
8. Distinguish between solids, liquids and gases in tabular form under the following characteristics :
(a) Interparticle force of attraction
(b) Diffusion
(c) Fluidity.​

Answer 1

7.a)a liquid generally flows easily beacause the intermoleculer space in liquid is more as compared to solids.

b)beacause the ice

absorb more latent heat as compared to water at same temprature.

c)beacause the water absorb the heat of the body and then evaporate thereby the reducing of temprature of body.

8.fluidity:the ability of substance to flow or move about freely.

b)diffusion:the intermingling of substance by the natural movement of their particles.

c)intermoleculer forces of attraction are the forces which mediate interaction between molecules.