MHT CET Chemistry question

Not in JEE Main or NEET syllabus

Which set of characteristic of ZnS crystal is correct?

(A)Coordination number (4:4) ; ccp ; ions in the alternate tetrahedral voidsCorrect
(B)Coordination number (6:6) ; hcp ; ions in all tetrahedral voids
(C)Coordination number (6:4) ; hcp ; ions in all octahedral voids
(D)Coordination number (4:4) ; ccp ; ions in all tetrahedral voids

Answer: (A)

Solution

In zinc blende, ions form ccp and ions occupy alternate (half of the) tetrahedral voids giving 4:4 coordination; (d) is wrong

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Question ID VK-042731