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

  • question_answer
    A solid has a 'bcc' structure. If the distance of nearest approach between two atoms is \[1.73\overset{{}^\circ }{\mathop{A}}\,\], the edge length of the cell is

    A) 314.20 pm

    B) 1.41 pm

    C) 200 pm     

    D) 216 pm

    Correct Answer: C

    Solution :

    [c] For bcc structure \[d=\frac{\sqrt{3}a}{2}\] where d' = distance between two atoms a = edge length \[1.73=\frac{\sqrt{3}}{2}a\] \[a=\frac{2\times 1.73}{\sqrt{3}}=2\overset{{}^\circ }{\mathop{A}}\,=200pm\]


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