Question

The nature of interaction involved at the gas-solid interface in physisorption is

• A. ionic
• B. van der Waals
• C. hydrogen bonding
• D. covalent

Answer 1

The Correct Option is B

$$\text{The nature of interaction involved at the gas-solid interface in physisorption is } \mathbf{\text{van der Waals forces}}$$

$\text{Explanation of Physisorption}$

Physisorption (or Physical Adsorption) is a type of adsorption where the gas molecules (adsorbate) are held to the surface of the solid (adsorbent) by weak intermolecular forces.

The primary force responsible for this weak interaction is the van der Waals force.

Van der Waals forces include London dispersion forces, dipole-dipole interactions, and dipole-induced dipole interactions. These are general, non-specific forces that exist between all atoms and molecules.