Which one of the following statements is not | vedclass

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(C) Physical adsorption (physisorption) is characterized by weak van der Waals forces between the adsorbate and the adsorbent. $1$. It is an exothermi

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Activation energy of physical adsorption is very high

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(C) Physical adsorption (physisorption) is characterized by weak van der Waals forces between the adsorbate and the adsorbent. $1$. It is an exothermic process,so it decreases with an increase in temperature. $2$. It is multilayered due to the non-specific nature of van der Waals forces. $3$. The enthalpy of adsorption is low,typically in the range of $20-40 \ kJ \ mol^{-1}$. $4$. Since it involves weak forces,the activation energy required for physical adsorption is very low,not high. Therefore,the statement that the activation energy of physical adsorption is very high is incorrect.

Which one of the following statements is not correct?

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