Which pair among the following is isostructural?

Options

A. `XeF_2, IF_2^(-)`
B. `NH_3, BF_3`
C. `CO_3^(2-)`
D. `PCl_3, ICI_5`

Answer

A

Explanation

Isostructural implies identical shape and geometry. Steric number of `Xe` in `XeF_2` is five (2 atoms bonded + lone pairs). Steric number of `I` in `IF_2^(-)` is also five (2 atoms bonded + 3 lone pairs). Therefore, both have trigonal bipyramidal geometry but linear shape.