MHT CET 2023 Chemistry question

Not in JEE Main or NEET syllabus

Identify false statement regarding adsorption from following

(A)It takes place due to unbalanced forces acting on the surface of solid or liquid
(B)During adsorption surface energy of adsorbent increasesCorrect
(C)It is caused by van der Waals forces
(D)It is an exothermic process

Answer: (B)

Solution

Atoms/molecules at a surface experience unbalanced attractive forces, so the surface has excess surface energy; adsorbate molecules are pulled onto the surface to partly satisfy these forces, so (a) is true. When they are held on the surface the unbalanced forces are reduced, which means the surface energy of the

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Question ID VK-098007