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 of the following properties are related to physical adsorption? (1) Reversible (2) Formation of unimolecular layer (3) Low heat of adsorption (4) Occurs at high temperatureA) 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: D
Solution :
Physical adsorption is a reversible process. It involves the formation of multimolecular layer. For physical adsorption heat of adsorption is low, hence it occurs at low temperature.
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