Question

Which of the following statement is correct about $CsB{r}_3$?

• A. It is a covalent compound
• B. It contains $C{s}^{3+}$ and $B{r}^{-}$ ions
• C. It contains $C{s}^{+}$ and $B{r}_3^{-}$ ions
• D. It contains $C{s}^{+}$ and $B{r}^{3-}$ ions

Answer 1

The correct option is C It contains $C{s}^{+}$ and $B{r}_3^{-}$ ions

Cesium being an alkali metal will have a valency of +1 giving $C{s}^{+}$ ion. Bromine forms a tribromide ion ($B{r}_3^{-}$) which gives the compound $CsB{r}_3$.