NEET Chemistry Surface Chemistry Questions Solved

BOARD

Define each of the following terms:

(i) Micelles    (ii) Peptization     (iii) Desorption

(i) Micelles: The substances, which when dissolved in a medium at low 

concentrations behave as normal, strong electrolytes but at higher 

concentration exhibit colloidal state properties due to the formation of aggregated 

particles and such aggregated particles thus formed are called micelles.

(ii) Peptization: It is a process of converting a fresh precipitate into colloidal 

particles by shaking it with the dispersion medium in the presence of a small

amount of a suitable electrolyte.

(iii) Desorption: The removal of adsorbed substance from the surface of a 

solid or liquid by heating or by reducing pressure is called desorption.

Difficulty Level:

  • 91%
  • 10%
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