The main type of force responsible for physical adsorption (physisorption) of a gas on a solid surface is:

ACovalent bonds
BIonic bonds
Cvan der Waals forces
DMetallic bonds

Answer: C

Physisorption arises from weak, non-specific van der Waals attractions between gas molecules and the surface. Chemical bonds (covalent, ionic) are involved only in chemisorption.

Practice Surface Chemistry More on Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms

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More questions on Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms

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