The following statement relate to the adsorption of gases on a solid surface. Identify the incorrect statement among them :

Options

A. Enthalpy of adsorption is negative
B. Energy appears as heat
C. On adsorption, the residual forces on the surface are increased
D. Entropy of adsorption is negative

Answer

C

Explanation

Adsorption is a phenomena of attracting and retaining the molecules of a substance on the surface of a liquid or a solid resulting into a higher concentration of the molecules on the surface.
After adsorption there is a decrease in the residual forces due to bond formation `DeltaG DeltaH & DeltaS` all are negative in the case of adsorption.