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

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    When a copper wire is placed in a solution of \[AgN{{O}_{3}}\], the solution acquires blue colour. This is due to the formation of [Roorkee 1989]

    A)                 \[C{{u}^{2+}}\] ions

    B)                 \[C{{u}^{+}}\] ions

    C)                 Soluble complex of copper with \[AgN{{O}_{3}}\]

    D)                 \[C{{u}^{-}}\] ion by the reduction of \[Cu\]

    Correct Answer: A

    Solution :

                    Since, \[A{{g}^{+}}\] ions are reduced to Ag and \[E_{A{{g}^{+}}/Ag}^{o}>E_{C{{u}^{++}}/Cu}^{o}\] Cu is oxidized to \[C{{u}^{++}}\].


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