Which of the following statements is incorrect refgarding phsisorptions ?

Options

A. It occurs because of van der Waak's forces
B. More easily liquefiable gases are adsorbed readily
C. Under high pressure it results into multi-molecular layer on adsorbent surface
D. Enthalypy of adsorpton `(Delta H_(adsropton ))` is low and positove .

Answer

d

Explanation

Since adsorpton is exothermic process so ` Delta H`of adsro pton is always ` -ve` .