Question

$8:8$ type of packing is present in:

• A. $NaCl$
• B. $CsCl$
• C. $KCl$
• D. $MgO$

Answer 1

The correct option is B $CsCl$

Cesium Chloride has a simple cubic unit cell. $C{s}^{+}$ is present at the cubic hole and $C{l}^{-}$ form simple cubic lattice.
Hence, both types of ions have coordination no. of 8. Therefore, it is a 8:8 type of packing.