NEET Chemistry Surface Chemistry Questions Solved


What is meant by coagulation of a colloidal solution? Describe briefly

any three methods by which coagulation of lyophobic sols can be 

carried out.

The process of setting of colloidal particles is called coagulation or 

precipitation of the sol.

Methods of coagulation:

(i) By electrophoresis: The colloidal particles move towards oppositely

charged electrodes.

(ii) By mixing two oppositely charged sols.

(iii) By addition of electrolytes: When excess of an electrolyte is added,

the colloidal particles are precipitated.

Difficulty Level:

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