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Q.
The structure of $ XeO{{F}_{4}} $ is
Rajasthan PETRajasthan PET 2011
Solution:
In $ XeO{{F}_{4}},\text{ }Xe $ is $ s{{p}^{3}}{{d}^{2}} $ hybridised, $ Xe $ atom has one lone pair and 6 bond pairs with one $\pi$-bond pair hence geometry is square pyramidal due to lone pair effect.