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

  • question_answer
    An element having an atomic radius of 0.14 nm crystallizes in an fcc unit cell. What is the length of a side of the cell?

    A) \[0.56\text{ }nm\]  

    B) \[0.24\text{ }nm\]

    C) \[0.96\text{ }nm\]  

    D) \[0.4nm\]

    Correct Answer: D

    Solution :

    [d] For a fcc unit cell \[r=\frac{\sqrt{2}a}{4}\] \[a=\frac{4r}{\sqrt{2}}=2\sqrt{2}\times 0.14=0.39\approx 0.4nm.\]


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