The Valence Shell Electron Pair Repulsion Vsepr Theory

Let's evaluate each of the compounds:
1. XeOF₄ – square pyramidal: Xenon oxyfluoride (XeOF₄) has a square pyramidal geometry. It has five bonding pairs of electrons (one oxygen and four fluorine atoms) and one lone pair of electrons on xenon, resulting in a square pyramidal shape.
2. XeO₃ – pyramidal: Xenon trioxide (XeO₃) has a trigonal pyramidal geometry, not a pyramidal shape as indicated. It has three bonding pairs of electrons and one lone pair on xenon, giving it a trigonal pyramidal geometry.
3. XeF₄ – tetrahedral: Xenon tetrafluoride (XeF₄) has a square planar geometry, not tetrahedral. It has four bonding pairs of electrons and two lone pairs on xenon, leading to a square planar structure.
4. XeF₆ – distorted octahedral: Xenon hexafluoride (XeF₆) indeed has a distorted octahedral geometry, due to the presence of lone pairs on xenon.

Thus, the incorrect pair is (B), where the geometry of XeO₃ is trigonal pyramidal, not pyramidal.