A) 4
B) 6
C) 8
D) 1
Correct Answer: B
Solution :
In NaCI crystal, \[C{{l}^{-}}\] ions form the fee lattice and \[N{{a}^{+}}\] ions are present in the octahedral voids. Thus, each \[N{{a}^{+}}\] ion is surrounded by six \[C{{l}^{-}}\]ions at the corners of a regular octahedron.
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