Assertion (A) : Physical adsorption occurs at low temperature. Reason (R) : in physical adsorption, weak Van der Waals force of attraction exist. Other weak forces exist in physical adsorption are dipole-dipole interaction and dispersion forces. As these forces are weak, heat of adsorption is low. (a) Both A and R are correct but R is not correct explanation of A. (b) Both A and R are correct and R is the correct explanation of A.(c) Both A and R are wrong.(d) A is correct but R is wrong.

Assertion (A) : Physical adsorption occurs at low temperature. Reason

1.	Assertion (A) : Physical adsorption occurs at low temperature. Reason (R) : in physical adsorption, weak Van der Waals force of attraction exist. Other weak forces exist in physical adsorption are dipole-dipole interaction and dispersion forces. As these forces are weak, heat of adsorption is low. (a) Both A and R are correct but R is not correct explanation of A. (b) Both A and R are correct and R is the correct explanation of A.(c) Both A and R are wrong.(d) A is correct but R is wrong.
Answer» (b) Both A and R are correct and R is the correct explanation of A.