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JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

  • question_answer
    At 298 K, the standard reduction potentials are 1.51 V for\[MnO_{4}^{-}|M{{n}^{2+}},1.36V\]for \[C{{l}_{2}}|C{{l}^{-}},1.07V\] for \[B{{r}_{2}}|B{{r}^{-}},\]and \[0.54V\]for \[{{I}_{2}}|{{I}^{-}}.\]At pH = 3, permanganate is expected to oxidize : \[\left( \frac{RT}{F}=0.059V \right)\] [JEE Main Online Paper (Held On 11 April 2015)]  

    A) \[C{{l}^{-}},B{{r}^{-}}\]and \[{{I}^{-}}\]

    B) \[C{{l}^{-}}\]and\[B{{r}^{-}}\]

    C) \[B{{r}^{-}}\]and\[{{I}^{-}}\]

    D) \[{{I}^{-}}\]only

    Correct Answer: A

    Solution :

    Higher the reduction potential easier to reduce and oxidise the other species with lower reduction potential.


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