Question

The density of KBr is 2.75 gm cm^-3 . Length of the unit cell is 654 pm. K = 39, Br = 80. Then what is TRUE about the predicted nature of the solid?

(A) Solid has face centered cubic system with z = 4. 

(B) Solid has simple cubic system with z = 4. 

(C) Solid has face centered cubic system with z = 1. 

(D) Solid has body centered cubic system with z = 2.

Answer 1

Correct option: Solid has face centered cubic system with z = 4.

Explanation:

= 3.89 ≅ 4