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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    How many coulombs of electricity are required for reduction of 1 mole of \[MnO_{4}^{-}\] to \[M{{n}^{2+}}\]?

    A)  \[96500\text{ }C\]                   

    B)  \[1.93\times {{10}^{5}}C\]

    C)  \[4.83\times {{10}^{5}}C\]            

    D)  \[9.65\times {{10}^{6}}\text{ }C\]

    Correct Answer: C

    Solution :

    \[MnO_{4}^{-}\xrightarrow{{}}M{{n}^{2+}}\] \[M{{n}^{7+}}+5{{e}^{-}}\xrightarrow{{}}M{{n}^{2+}}\] Hence, 1 mole of \[MnO_{4}^{-}\] requires 5F.             \[=5\times 96500\,C\]                 \[=482500\,C\]                 \[=4.83\times {{10}^{5}}C\]


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