Which is not true for physical adsorption?
Specific in nature
Reversible in nature
Low enthalpy of adsorption
Multilayer
Physical adsorption is non specific in nature.
Which statements are correct ?
i) physical adsorption is due to Vander Waal’s forces
ii) physical adsorption decreases at high temperature
iii) physical adsorption is irreversible
iv) enthalpy for a chemical adsorption is generally lesser than that of physical adsorption