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  4. Incorrectly matched pair is:

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Q. Incorrectly matched pair is:

KCETKCET 2020The p-Block Elements - Part2

Solution:

In $XeF _{6}$ there are $6$ bond pairs and one lone pair. Thus the shape of $XeF _{6}$ is distorted octahedral.

In $XeOF _{4}, Xe$ is $sp ^{3} d$ hybridized and the shape is square pyramidal.

In $XeO _{3}$, $Xe$ is $sp ^{3}$ hybridized and the shape is trigonal pyramidal.

In $XeF _{4}, Xe$ is $sp ^{3} d ^{2}$ hybridized. It has $4$ bond pairs and two lone pairs. Thus, the shape is square planar.