Which of the following is a wrong statement for physisorption?

It is a reversible reaction.

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Reaction required an energy of activation.

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The value of adsorption enthalpy is low.

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It generally occurs at a low temperature.

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Solution

The correct option is B Reaction required an energy of activation.
When the particles of the adsorbate are held to the surface of the adsorbent by the physical forces, the adsorption is called physical adsorption or physiosorption. It is a reversible process and usually occurs at low temperature. The value of adsorption enthalpy is low in this process. It forms multimolecular layers. No activation energy is required in this process.

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