Question

Write one similarity between physisorption and chemisorption.

Answer 1

Physisorption	Chemisorption
1. Physisorption is non- specific in nature. It involves Waal’s interaction between adsorbate and adsorbent.	1. Chemisorption is highly specific in nature as it involves chemical bond formation between adsorbate and adsorbent.
2. On increasing the temperature physisorption decreases.	2. On increasing the temperature chemisorption increases.
3. Physisorption is reversible in nature.	3. Chemisorption is irreversible in nature.
4. In the case of physisorption, the enthalpy change is small.	4. In the case of chemisorption, the enthalpy change is high.

One similarity between physisorption and chemisorption both increases with increase in surface area.