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CMC Medical CMC-Medical Ludhiana Solved Paper-2013

  • question_answer
    The electronic configuration of \[Cu\,(II)\]is \[3{{d}^{9}}\] whereas that of \[Cu\,(I)\]is \[3{{d}^{10}}.\] Which of the following is correct?

    A)  Cu (II) is more stable

    B)  Cu (II) is less stable

    C)  Cu (I) and Cu (II) are equally stable

    D)  Stability of Cu (I) and Cu (II) depends on the nature of Cu salts

    Correct Answer: A

    Solution :

                    Though Cu (I) has \[3{{d}^{10}}\]configuration (stable) while Cu (II) has \[3{{d}^{9}}\]configuration, yet Cu (II) is more stable due to greater effective nuclear charge of Cu (II) (i.e., to hold 17 electrons instead of 18 in Cu(l)).


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