1.

Write the difference between adsorption and absorption​

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Answer:

Adsorption :

  • It is a surface phenomenon, Adsorbate molecules are held at the surface of ADSORBENT.
  • Initially, rate of absorption is rapid.
  • The concentration of the adsorbent surface is much more than that in the bulk.
  • E.g., WATER VAPOURS on silica gel.

Absorption :

  • Absorption occur in the bulk of absorbing substance.
  • Absorption occurs at uniform rate.
  • Absorbed material is uniformly distributed throughout the bulk means concentrated is same throughout and it is essentially a bulk phenomenon.
  • E.g., water vapours are absorbed by ANHYDROUS CaCl_{2}


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