A) 2
B) 4
C) 6
D) 8
Correct Answer: B
Solution :
In \[NaCl\] (rock salt) : Number of \[N{{a}^{+}}\]ions \[=12\] (at edge centers) \[\times \frac{1}{4}+1\](at body centre)\[\times 1=4\]. Number of \[C{{l}^{-}}\]ions \[=8\] (at corners)\[\times \frac{1}{8}+6\] (at face centre) \[\times \frac{1}{2}=4\]. Thus 4 formula units per unit cell.You need to login to perform this action.
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