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 (A) and ® are correct , and ® is correct explanartion of (AB. if both (A) and ® are correct , but ® is nmot the correct explanation ofC. if (A) is correct , but ® is incorrect.D. if both (A) and ® are icorrect .

Assertion (A) : Zinc blende and wurtzite both have `fcc` arrangement o

1.	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 (A) and ® are correct , and ® is correct explanartion of (AB. if both (A) and ® are correct , but ® is nmot the correct explanation ofC. if (A) is correct , but ® is incorrect.D. if both (A) and ® are icorrect .
Answer» Correct Answer - D Correct(A): Zinc blende has fcc arrangement of `S^(-2)` ions while wurtzite has hcp arrangement of `S^(2-)` ions. Correct(R): A unit cell of Zinc blende has 4 formula units while that of wrtzite has 6 formula units of ZnS.

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