A) hexagonal close packing
B) face centred cubic
C) square planar
D) body centred cubic
Correct Answer: B
Solution :
Sodium chloride (NaCI) has face centred cubic structure. It contains \[4N{{a}^{+}}\] and \[4C{{l}^{-}}\] in the unit cell. Each \[N{{a}^{+}}\]is surrounded by\[6C{{l}^{-}}\] ions and vice-versa.
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