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NEET Sample Paper NEET Sample Test Paper-10

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

    A)  6                    

    B)  8

    C)  2                    

    D)  10

    Correct Answer: A

    Solution :

    radius ration \[\left( \frac{{{r}^{+}}}{{{r}^{-}}} \right)\] Co-ordination number
    \[0.155-0.225\] 3
    \[0.225-0.414\] 4
    \[0.414-0.732\] 6
    \[0.732-1\] 8


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