Question

The number of formula unit in unit cell of CsCl, type is:

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is A 1

$C{s}^{+}$ is present at body centre $=1$

$C{l}^{-}$ is present at body corners $=\frac{1}{8}\times 8=1$

Therefore, in a unit cell one formula unit of $CsCl$ is present.