Assertion : Physical adsorption is reversible.
Reason : Chemical adsorption is alos reversible.

Reversible adsorption is

Reversible adsorption is :

Assertion : Physical adsorption increases with increase in temperature. Reason : Physical adsorption is an endothermic process.

Assertion : In physical adsorption , enthalpy of adsorption in very low. Reason : In physical adsorption , enthalpy of adsorption is very low. Reason : In physical adsorption , attraction between gas molecules and solid surface is due to weak van der Walls forces.