JEE Main 2023 — Surface Chemistry Question with Solution
JEE Main 2023 (24 Jan Shift 2)
Question
The number of statement/s which are the characteristics of physisorption is ___________.
A. It is highly specific in nature
B. Enthalpy of adsorption is high
C. It decreases with increase in temperature
D. It results into unimolecular layer
E. No activation energy is needed
Enter your answer
Show full solutionCorrect answer: 2
Step-by-step explanation
Physisorption is reversible in nature. It has low adsorption enthalpy nearly 20 to 40 kJ/mol. It results in a multimolecular layer. It decreases with increase in temperature. Activation energy is less or zero in physisorption.
C and E are correct. Hence, the correct answer is 2.
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This is a previous-year question from JEE Main 2023, covering the Surface Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.