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Question:

A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation: xm=kp0.5. Adsorption of the gas increases with:

decrease in p and increase in T

decrease in p and decrease in T

increase in p and increase in T

increase in p and decrease in T

Solution:

Solution:- (C) Increase in p and decrease in T
Freundlich adsorption isotherm
xm=Kp0.5
So on increasing pressure, xm increases. Physical adsorption decreases with an increase in temperature.
So, option (3) is correct.