Q. 18

Write any three d

Answer :

Physisorption


Chemisorption


• The adsorbate molecules are held at surface of adsorbent by weak van der waal forces.


• Lack of specificity i.e. any gas can get adsorbed on solid surface.


• Physisorption is reversible in nature.


• The adsorbate molecules are held at surface of adsorbent by chemical bonds.


• High specificity i.e. chemisorption will only occur if there is some possibility of chemical bonding between adsorbent and adsorbte.


• It is irreversible.


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