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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2003

  • question_answer
    The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its co-ordination number is :

    A)  6                                            

    B)  8

    C)  1                                            

    D)  4

    Correct Answer: B

    Solution :

    Coordination number is the number of atoms or ions which remain in direct contact with an atom in a crystal. The radius ratio greater than 0.732 implies that the crystal is body centred cubic and for bcc, the coordination number is 8.


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