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AMU Medical AMU Solved Paper-2000

  • question_answer
    A solid is formed from atom A and B and crystallizes into a face centred cubic lattice with A at the face centred position and B at the comers of the cube. Its molecular formula is represented by

    A)  \[A{{B}_{3}}\]                                  

    B)  \[{{A}_{3}}B\]

    C)  \[A{{B}_{2}}\]                                  

    D)  \[{{A}_{2}}B\]

    Correct Answer: B

    Solution :

                     Number of A atoms per unit cell \[=6\times \frac{1}{2}=3\] Number of B atoms per unit cell \[=8\times \frac{1}{8}=1\] Therefore, the molecular formula of the compound is \[{{A}_{3}}B\].


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