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

  • question_answer
    An element (atomic mass\[=100\text{ }g/mol\]) having bcc structure has unit cell edge 400 pm. Then, density of the element is

    A) \[10.376g/c{{m}^{3}}\]           

    B) \[5.188g/c{{m}^{3}}\]

    C) \[7.289\text{ }g/c{{m}^{3}}\]              

    D) \[2.144g/c{{m}^{36}}\]

    Correct Answer: B

    Solution :

    [b] \[\rho =\frac{Z\times M}{{{N}_{A}}\times {{a}^{3}}}\] \[=\frac{2\times 100}{6.023\times {{10}^{23}}\times {{\left( 400\times {{10}^{-10}} \right)}^{3}}}\] \[=5.188g/c{{m}^{3}}\]


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