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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2004

  • question_answer
    How many Faradays are required to reduce one mole of \[MnO_{4}^{-}\] to \[M{{n}^{2+}}\]?

    A)  \[1\]                    

    B)         \[2\]

    C)  \[3\]                    

    D)         \[5\]

    Correct Answer: D

    Solution :

    Oxidation state of \[Mn\]in \[MnO_{4}^{-}=+7\] \[\therefore \]Change in O.S. (equal to number of \[{{e}^{-}}\] involved)                 \[=7-2=5\] \[\therefore \]Number of Faradays required to reduce Mn04 into \[M{{n}^{2+}}\]+ is 5.


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