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  5. The Solid State / ठोस प्रावस्था

12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank MCQs - The Solid State

  • question_answer
    In \[Ca{{F}_{2}}\] type (fluorite structure) \[C{{a}^{2+}}\]ions form [A] structure and \[{{F}^{-}}\]ions are present in all [B] voids. The coordination number of \[C{{a}^{2+}}\] is [C] and \[{{F}^{-}}\] is  [D] [A], [B], [C] and [D] respectively are

    A)
    [A] [B] [C] [D]
    ccp octahedral 8 4

    B)
    [A] [B] [C] [D]
    bcc tetrahedral 4 8

    C)
    [A] [B] [C] [D]
    ccp tetrahedral 8 4

    D)
    [A] [B] [C] [D]
    ccp octahedral 4 8

    Correct Answer: C

    Solution :

    \[C{{a}^{2+}}\]ions form ccp structure while \[{{F}^{-}}\] ions are in all tetrahedral holes and coordination numbers are 8 and 4.


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