MHT CET 2025 Chemistry question

Not in JEE Main or NEET syllabus

Which from following process does NOT results in coagulation?

(A)electrophoresis
(B)by adding excess solventCorrect
(C)by mixing two oppositely charged sols
(D)by boiling

Answer: (B)

Solution

Coagulation (precipitation) of a lyophobic sol occurs when the colloidal particles lose their charge and aggregate. Methods: (i) electrophoresis - the particles migrate to the oppositely charged electrode, are discharged and coagulate; (ii) mutual coagulation by mixing two oppositely charged sols, which neutralise

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Question ID VK-102244