Question

With increasing temperature.

1
Physical adsorption increases
2
Chemical adsorption increases
3
Physical adsorption first decreases then
increases
4
Chemical adsorption first increases then
decreases​

Answer 1

Chemisorption initially increases then decreases with rise in temperature. The initial increase is due to the fact that heat supplied acts as activation energy. The decrease afterward is due to the exothermic nature of adsorption equilibrium