Surface ChemistryHard

Question

Select the incorrect statement related to colloids.

Options

A.Muddy water can be coagulated more e­ffectively by alums as compared to NaCl.
B.Surface tension of lyophilic colloids is less than that of dispersion medium.
C.When excess of AgNO3 is added in aqueous KI solution and the sol is subjected to electrophoresis, coagulation occurs near the anode.
D.Cloud bursting in atmosphere occurs due to large amount of water present in the cloud.

Solution

Due to excess Ag+, sol particles will be positively charged.

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