Question

Distonctive features of chemisorption but not found in physisorption

Answer 1

(i) Chemisorption is caused by chemical bond formation where as physisorption arises due to Van der Waals’ forces.
(ii) Chemisorption is highly specific in nature whereas physisorption is not specific.
(iii) Chemisorption results into unimolecular layer whereas physisorption results into multimolecular layers.
(iv) Chemisorption is irreversible in nature whereas physisorption is reversible in nature.
(v) Chemisorption first increases with increase in temperature, then decreases while physisorption decreases with increase in temperature.

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