Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2010

  • question_answer
    How many grams of nickel can be electroplated from a solution of nickel chloride by 4F of electricity?

    A)   \[29.3\]                             

    B)  \[58.7\]

    C)  \[117.4\]                            

    D)  \[176.1\]

    Correct Answer: C

    Solution :

    \[NiC{{l}_{2}}\xrightarrow{Electrolysis}N{{i}^{2+}}+2C{{l}^{-}}\] At anode, \[2C{{l}^{-}}\xrightarrow{{}}C{{l}_{2}}+2{{e}^{-}}\] At cathode,    \[N{{i}^{2+}}+\underset{2F}{\mathop{\underset{2F}{\mathop{2{{e}^{-}}}}\,}}\,\xrightarrow{{}}\underset{58.6g}{\mathop{\underset{1\,mol}{\mathop{Ni}}\,}}\,\] \[\because \]2F electricity deposits \[Ni=58.6\text{ }g\] \[\therefore \] 4F electricity will deposit                 \[Ni=\frac{58.6}{2F}\times 4F=117.2g\]


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