CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2000

  • question_answer
    A solid AB has\[NaCl\]structure. If the radius of cation\[{{A}^{+}}\]is 170 pm. Calculate the maximum possible radius of the anion\[{{B}^{-}}\].

    A)  210.3pm             

    B)         397.4pm

    C)  410.6pm             

    D)         347.9pm

    E)  156.3 pm

    Correct Answer: C

    Solution :

    For\[NaCl\]type structure. \[\frac{r_{c}^{+}}{{{r}_{{{A}^{-}}}}}=0.414-0.737\] For maximum possible radius of \[\overline{\text{A}}\] \[\frac{r_{c}^{+}}{{{r}_{{{A}^{-}}}}}=0.414\] \[{{r}_{{{A}^{-}}}}=\frac{170}{0.414}=410.6\,pm\]            


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