Is physical adsorption specific in nature?

Yes, physical adsorption is non-specific in nature.

Physical adsorption

This type of adsorption is also known as physisorption. It is due to weak Van der Waals force between adsorbate and adsorbent.

1. Physical forces cause this type of adsorption.
2. Physisorption is a weak phenomenon.
3. This adsorption is a multi-layered process.
4. Physical adsorption is not specific and takes place all over the adsorbent.
5. Surface area, temperature, pressure, nature of adsorbate effects physisorption.
6. Energy for activation is low (20 – 40 kg/mol).