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J & K CET Engineering J and K - CET Engineering Solved Paper-2008

  • question_answer
    For AX ionic crystal to exist in bcc structure, the ratio of radii \[\left( \frac{{{r}_{cation}}}{{{r}_{anion}}} \right)\] should be

    A)  between 0.41 and 0.73

    B)  greater than 0.73

    C)  less than 0.41

    D)  equal to 1.0

    Correct Answer: B

    Solution :

     For body centred cubic (bcc) structure, the ratio    of radii \[\left( \frac{{{r}_{cation}}}{{{r}_{anion}}} \right)\] lies in between\[0.732-1.00.\] \[\therefore \]The ratio of radii for bcc is greater than 0.73.


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