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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Mock Test - Solid State

  • question_answer
    In a face centered lattice of X and Y, X atoms are present at the comers while Y atoms are at face centers. Then the formula of the compound would be if two atoms of X are missing from the comers:

    A) \[{{X}_{4}}\]Y 

    B) \[{{X}_{3}}\]\[{{Y}_{4}}\]

    C) X\[{{Y}_{4}}\]             

    D) \[{{X}_{2}}\]\[{{Y}_{4}}\]

    Correct Answer: C

    Solution :

    [c] for \[X,\]       \[6\times \frac{1}{8}=\frac{3}{4}\]
    For Y,               \[6\times \frac{1}{2}=3\]
    So  \[{{X}_{3/4}}{{Y}_{3}}\] or \[{{X}_{3}}{{Y}_{12}}\] or \[X{{Y}_{4}}\]


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