Question

Powdered substances are more effective adsorbents than their crystalline form because:

• A. adsorption is an exothermic process
• B. they become inert and do not react with the adsorbate
• C. the extent of adsorption increases with increase in surface area of the adsorbent
• D. adsorption is more if the size of adsorbent is small.

Answer 1

The correct option is C the extent of adsorption increases with increase in surface area of the adsorbent

in case of a bulk substance the surface area is less than that of the powdered one,so the molecules present in the lower layers cannot be adsorbed that efficiently so powdered substance is more prefereable because the substance will be distributed.