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JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Electrode potential Ecell Nernst equation and ECS

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    \[KMn{{O}_{4}}\] acts as an oxidising agent in the neutral medium and gets reduced to \[Mn{{O}_{2}}\]. The equivalent weight of \[KMn{{O}_{4}}\] in neutral medium [AMU 2001]

    A)                 mol. wt/2           

    B)                 mol.wt/3

    C)                 mol. wt/4           

    D)                 mol .wt/7

    Correct Answer: B

    Solution :

                    In neutral medium \[M{{n}^{+7}}\] oxidation state change into +4 oxidation state, hence equivalent weight of \[C{{u}^{++}}+2{{e}^{-}}\to Cu;\,\,\,\,E_{C{{u}^{++}}/Cu}^{o}=0.\,34\,\,V\,\].


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