1.

Which one of the following acts as the best coagulating agent of ferric hydroxide sol ?

Answer»

magnesium chloride
HYDROCHLORIC acid
aluminium chloride
potassiumferricyanide

Solution :`Fe(OH)_(3)` sol is positively charged. HENCE, anion with the highest valency will be best coagulation AGENT i.e., `[Fe(CN)_(6)]^(3-)`


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