Discuss the effect of pressure and temperature on the adsorption of gases on solids.

How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?

Why is adsorption always exothermic?

What role does adsorption play in heterogeneous catalysis?

What is an adsorption isotherm? Describe Freundlich adsorption isotherm.

What are the factors which influence the adsorption of a gas on a solid?

Give reason why a finely divided substance is more effective as an adsorbent?

What is the difference between physical adsorption and chemisorption ?

Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.