Home Chemistry Surface Chemistry NCERT Why do physisorption and chemisorption behav…
Chemistry Surface Chemistry NCERT Single Correct MCQ
Published on: August 12, 2026

Why do physisorption and chemisorption behave differently with increasing temperature

A
Physisorption forms multilayers while chemisorption form unimolecular
B
Physisorption is not specific while chemisorption is highly specific in nature.
C
Physisorption is endothermic while chemisorption is exothermic.
D
Physisorption involves weak van der Waal’s forces while chemisorption involves formation of chemical bonds.

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Text Solution

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The correct answer is:
D

Physisorption involves weak van der Waal’s forces which become weaker with rise in temperature. The chemisorption involves formation of chemical bonds involving activation energy. With increase in temperature, we reach the activated complex faster. Therefore, chemisorption process becomes faster

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