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JEE Main202324 Jan 2023Evening ShiftChemistrySurface ChemistryActual

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

Correct answer

0

Step-by-step solution

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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