A) Adsorption energy for chemical adsorption is generally greater than that of physical adsorption
B) Physical adsorption is due to van der Waal forces
C) Physical adsorption decreases at high temperature and low pressure
D) Physical adsorption is irreversible
Correct Answer: D
Solution :
Physical adsorption is due to van der Waals forces which are weak forces, hence this type of adsorption is reversible and not irreversible. All other statements are correct.
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