Which of the following statements is incorrect regarding physisorption ?

Options

A. Under high pressure, it results into multimolecular layer on adsorbent surface
B. Enthalpy of adsorption `(triangle_("ads")H)` is low and positive
C. It occurs because of van der Waals forces
D. More easily liquefiable gases are adsorbed readily

Answer

B

Explanation

Adsorption is an exothermic process and thus `triangle_(ads)` has a negative value.