Since physical adsorption is non specific in nature, any gas will be adsorbed on the surface of a solid to some extent or other. However, under any given conditions of temperature and pressure, easily liquefiable gases such as `NH_3, CH_4, HCl, Cl_2, SO_2, CO` etc. are adsorbed more than permanent gases like `H_2,O_2, N_2` etc. Chemisorption is specific in nature. Therefore, only those gases will be adsorbed which form chemical bonds with it.
Since physical adsorption is non specific in nature, any gas will be adsorbed on the surface of a solid to some extent or other. However, under any given conditions of temperature and pressure, easily liquefiable gases such as `NH_3, CH_4, HCl, Cl_2, SO_2, CO` etc. are adsorbed more than permanent gases like `H_2,O_2, N_2` etc. Chemisorption is specific in nature. Therefore, only those gases will be adsorbed which form chemical bonds with it.