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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Critical Thinking The Solid State

  • question_answer
    If the coordination of \[C{{a}^{2+}}\]in \[Ca{{F}_{2}}\] is 8, then the coordination number of \[{{F}^{-}}\] ion would be

    A) 3             

    B) 4

    C) 6             

    D) 8

    Correct Answer: B

    Solution :

    In each \[Ca{{F}_{2}}\] each calcium cation is surrounded by eight fluoride anions in a body centred cubic arrangement. Each fluoride ion is in contact with four calcium ions. Thus \[Ca{{F}_{2}}\] has 8 : 4 co-ordination number.


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