In the compound formation xenon atom is in the third excited state, the expected hybridisation of xenon is

If a xenon atom is in the third excited state, it means that one or more of its electrons have been promoted to higher energy levels. However, the hybridization of xenon in a compound is determined by its valence electrons, which are the electrons in the outermost energy level.

Xenon is a noble gas and normally has eight valence electrons, so it can form compounds using its vacant d-orbitals. In general, the hybridization of xenon in its compounds is sp3d2 or dsp3, depending on the number and nature of the ligands surrounding the xenon atom.