Chemistry - Surface Chemistry Question with Solution | TestHub

Question Explanation:

Question is asking about related to adsorption processes.

Concept:

This question is based on adsorption processes.

Solution:

1) Chemisorption is unimolecular layered.

(2) Enthalpy of physisorption is much less in magnitude while in chemisorption it is 80 to 240 kJ mol^-1 .

(3) Chemisorption of gases on solids is exothermic.

(4) As physisorption is exothermic so lowering temperature favours it.

Final Answer: Option (A, D)