Q. The correct option(s) related to adsorption processes is(are)

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Solution:

(A) Chemisorption is unimolecular layered.
(B) Enthalpy of physisorption is much less in magnitude.
(C) Chemisorption of gases on solids is exothermic.
(D) As physisorption is exothermic so lowering temperature favours it.