question_answer

There is a decrease in the extent of adsorption after sometime while absorption proceeds at a uniform rate. Explain.

Answer:

                Adsorption is a surface phenomenon. As more and more of the surface of the adsorbent gets occupied or covered, the extent of adsorption decreases. On the other hand, absorption occurs throughout the body of the absorbent. Therefore, it is not related to the surface and proceeds at a uniform rate.