Identify the pair of species in which both the central atoms have the same hybridization, but one species is planar and the other is non-planar.

Step-by-step solution

The hybridization and shape for each pair can be determined by finding the steric number and the number of lone pairs. For XeF ₄ and IF ₅ : XeF ₄ : Steric number = 1 2 (8 + 4) = 6 sp ^3 d ^2 . It has 4 bond pairs and 2 lone pairs, resulting in a square planar geometry (planar). IF ₅ : Steric number = 1 2 (7 + 5) = 6 sp ^3 d ^2 . It has 5 bond pairs and 1 lone pair, resulting in a square pyramidal geometry (non-planar). This pair shares the same hybridization but differs in planarity. For NO ₃⁻ and CO ₃²⁻ : Both hav