A) increase in temperature
B) decrease in surface area of the adsorbent
C) decrease in pressure of adsorbate
D) decrease in temperature
Correct Answer: D
Solution :
Physisorption (physical adsorption) is a process in which adsorbate is held to the adsorbent by weak forces such as van der Waals forces of attraction. It is a spontaneous \[(\Delta G=-ve)\] and exothermic process. In accordance with Le-Chateliefs principle, the magnitude of adsorption should increase with fall in temperature.
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