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Enthalpy of adsorption is quite low in c...

Enthalpy of adsorption is quite low in case of physisorption because of

A

strong bonding forces

B

weak van der Waals. forces

C

mechanical forces

D

H-bonding

Text Solution

Verified by Experts

The correct Answer is:
B
Physical adsorption is an exothermic process but its enthalpy of adsorption is quite low (20 to 40 kJ `mol^(-1)`). This is because the attraction between gas molecules and solid surface is only due to weak van der Waals. forces.
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