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J & K CET Engineering J and K - CET Engineering Solved Paper-2006

  • question_answer
    The radius ratio \[\left( \frac{{{r}^{+}}}{{{r}^{-}}} \right)\] of an ionic solid\[({{A}^{+}}{{B}^{-}})\]is 0.69. What is the coordination number of\[{{B}^{-}}\]?

    A)  6             

    B)  8

    C)  2 

    D)  10

    Correct Answer: A

    Solution :

               \[\frac{{{r}_{c}}}{{{r}_{a}}}\]                       Coordination number \[0.155-0.225\]            3 \[0.225-0.414\]            4 \[0.414-0.732\]            6                \[0.732-1\]                     8


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