Write one similarity between Physisorption and Chemisorption.

• If adsorption of a gas on the solid surface occurs with help of weak Vander Waals’ forces, the adsorption is physisorption.

• When the gas particles are held to the solid surface by chemical bonds, the adsorption is chemisorption.

The diagram is given below:

Similarity: In both the cases adsorption of gases on solids occurs and this is a similarity.

Moreover, depending on the surface area and increases with an increase in

the surface area of the adsorbent.