JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which of the following statements is incorrect regarding physisorption?

(A)It occurs because of van der Waals' forces
(B)More easily liquefiable gases are adsorbed readily
(C)Under high pressure it results into a multimolecular layer on the adsorbent surface
(D)Enthalpy of adsorption () is slow and positiveCorrect

Answer: (D)

Solution

Physisorption is caused by weak van der Waals' forces (A), easily liquefiable gases with higher critical temperatures are adsorbed more readily (B), and at high pressure it builds up

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Question ID VK-144678