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CMC Medical CMC-Medical VELLORE Solved Paper-2010

  • question_answer
    The radius of \[N{{a}^{+}}\]is 95 pm and that of \[C{{l}^{-}}\]is 181 pm. The coordination number of \[N{{a}^{+}}\]is

    A)  8                                            

    B)  6

    C)  4                                            

    D)  unpredictable

    E)  None of these

    Correct Answer: B

    Solution :

                    \[\frac{{{r}_{+}}}{{{r}_{-}}}=\frac{95}{101}=0.524\] \[\because \] The radius ratio lies between 0.414 to 0.732. \[\therefore \]The coordination number of \[N{{a}^{+}}\]is 6.


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