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NEET Chemistry The Solid State / ठोस प्रावस्था Question Bank Self Evaluation Test - The Solid State

  • question_answer
    How many effective \[N{{a}^{+}}\] and \[C{{l}^{-}}\] ions are present respectively in a unit cell of \[NaCl\] solid (Rock salt structure) if all ions along line connecting opposite face centres are absent?

    A) 3, 3  

    B) \[\frac{7}{2},4\]

    C) \[\frac{7}{2},\frac{7}{2}\]         

    D) \[4,\frac{7}{2}\]

    Correct Answer: A

    Solution :

    [a] No. of \[N{{a}^{+}}=4-1=3\] No. of \[C{{l}^{-}}=4-\left( 2\times \frac{1}{2} \right)=3\]


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