Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which is not true for physical adsorption? (1) It forms mono-molecular layers (2) It is irreversible (3) The forces present weak van der-Waals' forces (4) rate of adsorption increases with increase in pressure of adsorbateA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: B
Solution :
In physical adsorption weak van der Waals' forces present. It forms multimolecular layers. It is reversible and in the physical adsorption the rate of adsorption increases with increase in pressure of adsorbate.
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