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Assertion (A) : Zinc blende and wurtzite...

Assertion (A) : Zinc blende and wurtzite both have `fcc` arrangement of `S^(2-)` ions.
Reason (R ) : A unit cell of both has four formula units of `ZnS`.

A

If both assertion and reason are true, and reason is the true explanation of the assertion.

B

If both assertion and reason are true, but reason is not the true explanation of the assertion.

C

If assertion is true , but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
Correct A. Zinc blende has fcc arrangement of `S^(2-)` ions while wurtzite has hexagonal close packing arrangement of `S^(2-)` ions.
Correct R. A unit cell of zinc blende has 4 formula units while that of wurtzite has 6 formula units of ZnS
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