The number of inter halogens from the following having square...

Square pyramidal structures are ${BrF}_{5}, {IF}_{5}$ and ${ClF}_{5}$.

These molecules are made up of 6 equally spaced ${sp}^{3}{d}^{2}$ hybrid orbitals arranged at ${90}^{o}$ angles. The shape of the orbitals is octahedral. One orbital contains a lone pair of electrons, so the remaining five atoms connected to the central atom gives the molecule a square pyramidal shape. Among the given options the structure with five bond pairs and one lone pair is these three structures only.