A) zinc ions occupy half of the tetrahedral sites.
B) each \[Z{{n}^{2+}}\] ion is surrounded by six sulphide ions
C) each \[{{S}^{2-}}\] ion is surrounded by six \[Z{{n}^{2+}}\] ions
D) all of these.
Correct Answer: A
Solution :
ZnS has a ccp structure. \[{{S}^{2-}}\] ions are present at the corners of the cube and centre of each face. \[Z{{n}^{2+}}\] ions occupy half of the tetrahedral sites. Each \[Z{{n}^{2+}}\] ion is surrounded by four \[{{S}^{2-}}\]ions and each \[{{S}^{2-}}\] ion is surrounded by four \[Z{{n}^{2+}}\] ions.
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