Question

Which of the following statements about physical adsorption is not correct?

• A. It is usually monolayer
• B. It is reversible in nature
• C. It involves van der Waals interactions between adsorbent and adsorbate
• D. It involves small value of adsorption

Answer 1

The correct option is A It is usually monolayer

Physical adsorption is weak, multilayer, non-directional and non-specific. Physisorption happens due to weak attraction forces like van der waal's forces but chemisorption happens due to specific strong forces and extent of adsorption is small here due to weak forces.