Ncert Exercises & Solutions

Physical adsorption is not favoured by :

1. High pressure.

2. Negative $∆$ H

3. Higher critical temperature of adsorbate.

4. High temperature.

(4) HINT: Extent of physical adsorption

α \frac{1}{Temperature}

Explanation: Physisorption is a process in which adsorbate get adsorbed on the adsorbent surface by weak van der Waals’ force of attraction. On increasing temperature the interaction between adsorbate and adsorbent becomes weak and ascorbate particles get desorbed.

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