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Manipal Medical Manipal Medical Solved Paper-2010

  • question_answer
    The \[E_{{{M}^{3+}}/M{{n}^{2+}}}^{o}\] values for\[Cr,Mn,Fe\]and\[Co\]are \[-0.41,+1.57,+0.77\] and\[+1.97V\]respectively. For which one of these metals the change in oxidation state from + 2 to + 3 is easiest?

    A)  \[Cr\]            

    B)  \[Mn\]

    C)  \[Fe\]              

    D)  \[Co\]

    Correct Answer: A

    Solution :

     More the negative value of standard reduction potential, higher is the reducing power and higher is the tendency to get oxidised. The\[E{}^\circ \]value is most negative for Cr among the given, hence it has higher tendency to change from +2 to +3 state.


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