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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-40

  • question_answer
    The electrolyte most effective for bringing about coagulation of \[Fe{{(OH)}_{3}}\]sol is

    A) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]      

    B) \[BaC{{l}_{2}}\]

    C) NaCl                           

    D) None

    Correct Answer: A

    Solution :

    \[Fe{{(OH)}_{3}}\]is positive sol. \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] will provide \[{{[Fe{{(CN)}_{6}}]}^{4-}}\]for coagulation.


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