Question

In physical adsorption, the adsorbent and adsorbate are held together by the

• A. ionic forces
• B. covalent forces
• C. van der Waals’ forces
• D. H-bonding

Hint:

Physisorption = weak forces; Chemisorption = strong bonds.

Answer 1

The Correct Option is C

Understanding the Concept: Types of adsorption.

Step 1: Physical adsorption involves weak intermolecular forces.

Step 2: These are van der Waals’ forces.

Step 3: Chemical adsorption involves strong covalent/ionic bonds.
Final Answer:
Physical adsorption uses van der Waals’ forces.