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The disperse phase in colloidal iron (III) hydroxide and colloidal gold are positive and negatively charged respectively. Which of the following statements is not correct?

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Mixing both solutions cause coagulation.

Coagulation in both sols can be brought about by electrophoresis.

Barium chloride has more coagulating power towards the iron (III) hydroxide colloidal solution than the gold colloidal solution.

Addition of $N a C l$ cause coagulation in both colloidal solutions.

answer is C.

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Detailed Solution

Greater the magnitude of charge on the electrolyte added more will be the coagulating power towards oppositely charged colloidal solutions.

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