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  4. Which one of the following acts as the best coagulating agents for ferric hydroxide sol?

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Q. Which one of the following acts as the best coagulating agents for ferric hydroxide sol?

CMC MedicalCMC Medical 2008

Solution:

Potassium ferricyanide acts as the best coagulating agent for ferrichydroxide sol due to higher valency of ferricyanide ion $ {{[Fe{{(CN)}_{6}}]}^{4-}} $ . (Hardy-SchuIze rule)