Question

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

Answer 1

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.