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Which of the following statements about xenon tetrafluoride (XeF4) is/are correct?

1. XeF4 has sp3d2 hybridisation and a square planar geometry
2. The xenon atom in XeF4 has two lone pairs of electrons
3. XeF4 is a non-polar molecule with zero net dipole moment
4. All of the above

Correct answer: All of the above

Solution

Xe in XeF4 uses sp3d2 hybridisation (6 electron pairs: 4 bonding + 2 lone pairs). The molecule is square planar. The two lone pairs are in axial positions, mutually cancelling, so the net dipole moment is zero. XeF4 is therefore non-polar. All three individual statements are correct.

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