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Question

Assertion :Physical adsorption of molecules on the surface requires activation energy. Reason: Because the bonds of adsorbed molecules are broken.

A
If both (A) and (R) are true and (R) is the correct explanation of (A).
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B
If both (A) and (R) are true, but (R) is not the correct explanation of (A).
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C
If (A) is correct, but (R) is incorrect.
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D
If (A) and (R) are both incorrect.
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Solution

The correct option is D If (A) and (R) are both incorrect.

Physical adsorption does not involve any energy of activation as there is no chemical bond formation between the adsorbed molecules and the surface (and hence there is no necessity for bonds of adsorbed molecules to be broken).

Hence option (D) is correct.


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