Statement - I : Enthalpy of physical adsorption is lower than chemical adsorption
Statement - II : Molecule of adsorbate and adsorbent are held together by vanderwaal forces in physical adsorption and by chemical bonds in chemical adsorption

The enthalpy of chemisorption is of the order of 200 kJmol⁻¹ while for physical adsorption it is of the order of 20 kJmol⁻¹. Because molecules of adsorbate and adsorbent are held by van der Waals forces in physisorption and by chemical bonds in chemisorption.