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JEE Main & Advanced Sample Paper JEE Main Sample Paper-20

  • question_answer
    \[96.5\,gm\]. of oxidized as \[A\to {{A}^{3+}}+3{{e}^{-}},\] when 2F charge is passed through solution with current efficiency of 90%. What is electrochemical equivalent of A?

    A)  \[53.61\]                      

    B)  \[48.25\]

    C)  \[5.55\times {{10}^{-4}}\]                   

    D)  \[5.55\times {{10}^{-3}}\]

    Correct Answer: C

    Solution :

     \[w=Z\times n\times q\] \[Z=\frac{96.5}{0.9\times 2\times 96500}=5.55\times {{10}^{-4}}\]


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