Question

State true or false.

Physisorption occurs by Van-der-waal’s forces.

(a) Physisorption occurs by Van-der-waal’s forces.

(b) True

(c) False

The question was asked during an interview.

I'm obligated to ask this question of Packed Bed Catalytic Reactor topic in chapter Packed Bed Catalytic Reactor, Fluidised Bed and Transport Reactors of Chemical Reaction Engineering

Answer 1

Right answer is (a) Physisorption occurs by Van-der-waal’s forces.

Explanation: Physical adsorption is due to intermolecular Van-der-waal’s forces. Heat of adsorption is small and the adsorption is complete reversible.