(a) What does the diffusion of gases tell us about their particles?
(b) Give one example of diffusion of gases in a liquid.

(a) What is meant by 'diffusion'? Give one example of diffusion in gases.

(b) Why do gases diffuse very fast?

(c) Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?

Which one of the following set 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