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Question

Is physical adsorption specific in nature?


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Solution

Physical adsorption:

  • Adsorption is a surface phenomenon, which arises due to the unbalanced forces on the surface of solids and liquids.
  • When the particles of the adsorbate are held to the surface of the adsorbent by the physical forces like van der Waals forces, the adsorption is defined as physical adsorption or physisorption.
  • Physical adsorption is reversible in nature and in this adsorption no appreciable activation energy is required.
  • Physical adsorption has no specificity, as all gases are adsorbed on all solids to the same extent.
  • On a given surface, the adsorbent shows no preference for a particular gas because van der Waals forces are universal.

Hence, No, physical adsorption is not specific in nature.


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