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VIT Engineering VIT Engineering Solved Paper-2010

  • question_answer
    The number of Faradays needed to reduce 4 g equivalents of \[C{{u}^{2+}}\]to \[Cu\] metal will be

    A)  \[1\]              

    B)  \[2\]

    C)  \[1/2\]            

    D)  \[4\]

    Correct Answer: D

    Solution :

     
    \[C{{u}^{2+}}\] + \[2{{e}^{-}}\] \[\xrightarrow{{}}\] \[Cu\]
    \[1mol\] \[2F\] \[1mol\]
    \[\frac{1}{2}\,mol\] \[1F\] \[\frac{1}{2}\,mol\]
    \[1\,g\,equi\] \[1F\] \[1\,g\,equi\]
    Thus, to reduce 4 g equivalent of \[C{{u}^{2+}}\] into \[Cu\] four Faradays are required.


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