Reason (R) : ¡n 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
Reason (R) : ¡n 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.