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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Crystal packing

  • question_answer
    The ratio of close-packed atoms to tetrahedral holes in cubic close packing is      [Pb. PMT 1998]

    A)                 1 : 1       

    B)                 1 : 2

    C)                 1 : 3       

    D)                 2 : 1

    Correct Answer: B

    Solution :

               Every constituent has two tetrahedral voids. In ccp lattice atoms            \[=8\times \frac{1}{8}+6\times \frac{1}{2}=4\]            \ Tetrahedral void \[=4\times 2=8\],                                 Thus ratio \[=4:8::1:2\].


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