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NEETChemistrySurface Chemistry

Why is the enthalpy of adsorption in physical adsorption considered low?

Options

  1. AStrong covalent bonds are formed.
  2. BThe process is endothermic.
  3. CWeak van der Waals' forces are involved.
  4. DThe process is irreversible.

Correct answer

C. Weak van der Waals' forces are involved.

Step-by-step solution

The paragraph explains that the attraction between gas molecules and the solid surface in physical adsorption is only due to weak van der Waals’ forces, leading to a low enthalpy of adsorption.

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