Question

The density of $KBr$ is $2.75gc{m}^{-3}$ . The edge length of unit cell is $654pm$ , then structure of $KBr$ is :( $M_w$ of $KBr=119gmo{l}^{-1}$ )

• A. $BCC$ type
• B. $SCC$ type
• C. $FCC$ type
• D. $HCP$ type

Answer 1

Answer: (C)

Density $=\frac{Z\times M_W}{V\times N_A}$
$Z=4$