Question

A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation: $\frac{x}{m}=k{p}^{0.5}$

Adsorption of the gas increases with:

• A. decrease in p and decrease in T
• B. increase in p and increase in T
• C. increase in p and decrease in T
• D. decrease in p and increase in T

Answer 1

The correct option is C increase in p and decrease in T

Solution:- (C) Increase in p and decrease in T

Freundlich adsorption isotherm $\frac{x}{m}=K{p}^{0.5}$

So on increasing pressure, $\frac{x}{m}$ increases. Physical adsorption decreases with an increase in temperature.

So, option (3) is correct.