The following are the distinctions between physisorption and chemisorption:
In physisorption, the adsorbate is bonded to the surface by weak Van Der Waal forces of attraction, whereas in chemisorption, the adsorbate is bonded to the surface by a strong chemical bond (covalent or ionic bond).
Physisorption does not result in the formation of a new compound, whereas chemisorption results in the formation of a new compound on the surface.
Low temperature promotes physisorption, whereas high temperature promotes chemisorption.
Physisorption can be reversed, whereas chemisorption is irreversible.