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BCECE Medical BCECE Medical Solved Papers-2008

  • question_answer
    The number of moles of \[KMn{{O}_{4}}\] reduced by one mole of KI in alkaline medium is

    A)  1            

    B)  5

    C)  1/2          

    D)  1/5

    Correct Answer: A

    Solution :

    In alkaline medium                 \[{{\overset{+\,7}{\mathop{KMnO}}\,}_{4}}+O{{H}^{-}}\xrightarrow{{}}{{K}_{2}}{{\overset{+\,6}{\mathop{MnO}}\,}_{4}}\] Change in oxidation number                 = 7 - 6                 = 1 Hence, moles of \[KI=\] moles of \[KMn{{O}_{4}}\].


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