Question

Which of the following statements is incorrect regarding physisorptions?

Options

• More easily liquefiable gases are adsorbed readily.

• Under high pressure, it results into a multi-molecular layer on adsorbent surface.

• Enthalpy of adsorption `(Delta"H"_"adsorption")` is low and positive. 

• It occurs because of van der Waals forces.

Answer 1

Enthalpy of adsorption `(Delta"H"_"adsorption")` is low and positive.

Explanation:

Physiosorption is an exothermic process, so ΔH will always be negative.