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MGIMS WARDHA MGIMS WARDHA Solved Paper-2003

  • question_answer
    Which of the following element does not show variable valency?

    A) Ni                           

    B)  Zn

    C)  Cu                                         

    D)  Mn

    Correct Answer: B

    Solution :

                     The electronic configuration of Zn is [Ar]\[3{{d}^{10}},4{{s}^{2}}\]. Hence, due to complete d- subshell, it does not show variable valency. It shows only +2 valency.


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