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JEE Main & Advanced Chemistry Redox Reactions / रेडॉक्स अभिक्रियाएँ Question Bank Auto oxidation and Disproportionation

  • question_answer
    What is the equivalent mass of \[IO_{4}^{-}\] when it is converted into \[{{I}_{2}}\] in acid medium         [Kerala PMT 2004]

    A)                 M/6      

    B)                 M/7

    C)                 M/5      

    D)                 M/4

    E)                 None of these

    Correct Answer: B

    Solution :

               Equivalent mass                                      \[=\frac{\text{Molecular weight}}{\text{Change in oxidation number per mole}}\]                    Suppose molecular weight is \[M\]                    Oxidation number of \[{{I}_{2}}\] in \[IO_{4}^{-}\] in                    Acidic medium i.e., \[I\times (-8)+1{{e}^{-}}=+7\]                                 So eq. wt. \[=M/7\].


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