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The term adsorption refers strictly to t...

The term adsorption refers strictly to the existence of an concentration of any particular component (molecular species) at the surface of a liquid or solid phase than is present in the bulk.

A

higher

B

lower

C

higher or lower

D

equal

Text Solution

Verified by Experts

The correct Answer is:
A
In adsorption the concentration of the adsorbate increases only at the surface of the adsorbent while inh absorption the concentration is uniform throughout the bulk of the solid.
When the concentration of the adsorbate is more on the surface of adsorbent relative to its concentration in the bulk, it is called positive adsorption. On the other hand, when the concentration of the adsorption is less on the surface relative to its concentration in the bulk, it is called negative adsorption. It happens rarely. In the case of some liquid solutions, it is observed that the concentration of the solution is less on the surface than in the bulk of the solution, a case of negative adsorption.
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