Q.

Which of the following is incorrect for physisorption ?

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a

It is a reversible process

b

It requires less heat of adsorption

c

It requires activation energy

d

It takes place at low temperature

answer is C.

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Detailed Solution

Physisorption also known as Vander Waal's adsorption involves weak forces, physical in nature, with small heat of adsorption. Since no chemical bonds are formed, there is no need of activation energy.
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