The density of a certain solid AB (formula mass =119) is 2.75 `g//cm^(3)` .The edge of the unit cell is 654 pm long .What is/are true about the solid AB ?

Options

A. It has bcc unit cell
B. There are two constituents per unit cell
C. Unit cell constituted by anion is fcc
D. Structure is similar to ZnS.

Answer

C

Explanation

`z=(a^(3)xx d xx N_(A))/(M)=((654xx10^(-10))^(3)xx2.75xx6.023xx10^(22))/(119)=4`
Hence (C ) is correct choice.