1.

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

Answer»

If both assertion and reason are ture, and reason is the trure explanation of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason false.

Solution :Correct A. Activation energt is NEEDED for CHEMICAL adsorption and not for PHYSICAL adsorption.
Correct R. Breaking of bonds ALSO takes place only on chemical adsorption.


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