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JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Faraday's law of electrolysis

  • question_answer
    Three faradays electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt. = 56) deposited at the cathode (in gm) is [EAMCET 1991]

    A)                 56          

    B)                 84

    C)                 112

    D)                 168

    Correct Answer: B

    Solution :

               \[F{{e}^{2+}}+2{{e}^{-}}\to Fe;\,\,{{E}_{Fe}}=\frac{56}{2}=28\]                                 \[{{W}_{Fe}}={{E}_{Fe}}\] × Number of faraday \[=28\times 3=84\,\,gm\].


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