Question

A particular adsorption process has the following characteristics : (i) It arises due to van der Waals forces and (ii) it is reversible. Identify the correct statement that describes the above adsorption process :

• A. Enthalpy of adsorption is greater than ${100 \, kJ \, mol^{-1}}$
• B. Energy of activation is low.
• C. Adsorption is monolayer.
• D. Adsorption increases with increase in temperature.

Answer 1

Answer: (B)

Energy of activation is low.

Answer 2

In the care of physical Absorption there is almost nil energy of Activation and very low enthalpy change.