Question:

The correct statement about $\mathrm{ICl}_{5}$ and $\mathrm{ICl}_{4}^{-}$is

1. $\mathrm{ICl}_{5}$ is trigonal bipyramidal and $\mathrm{ICl}_{4}^{-}$is tetrahedral.

2. $\mathrm{ICl}_{5}$ is square pyramidal and $\mathrm{ICl}_{4}^{-}$is tetrahedral.

3. $\mathrm{ICl}_{5}$ is square pyramidal and $\mathrm{ICl}_{4}^{-}$is square planar.

4. Both are isostructural.

Correct Option: , 3

Solution: