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NEET Chemistry The Solid State / ठोस प्रावस्था Question Bank Self Evaluation Test - The Solid State

  • question_answer
    A solid AB crystallises as \[NaCl\] structure and the radius of the cation is \[0.100nm.\] The maximum radius of the anion can be:

    A) \[0.137nm\] 

    B) \[0.241nm\]

    C) \[0.274nm\]  

    D) \[0.482nm\]            

    Correct Answer: B

    Solution :

    [b] Solid AB crystallizes as \[NaCl\] structure, so it has coordination number 6 and its \[{{r}^{+}}/{{r}^{-}}\] ranges from \[0.414-0.732\]. For maximum radius of anion, we have to take the lower limit of the range \[0.414-0.732\]. So, \[~\frac{{{r}^{+}}}{{{r}^{-}}}=0.414\] \[\Rightarrow {{r}^{-}}=\frac{0.100}{0.414}nm=0.241nm\]


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