Choose the correct option and explain why.
The geometrical shapes of XeF₅⁺, XeF₆ and XeF₈²^- respectively are :-
1. Trigonal Bipyramidal, Octahedral, Square planar
2. Square based pyramidal, Distorted octahedral, square antiprismatic
3. planar pentagonal, octahedral, square antiprismatic
4. square based pyramidal, distorted octahedral, octahedral

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Solution

$H y b r i d i s a t i o n (H) = \frac{1}{2} [N o o f v a l e n c e e l e c t r o n o f t h e c e n t r a l a t o m + N o o f s u r r o u n d i n g m o n o v a l e n t a t o m - c a t i o n + a n i o n] N o o f l o n e p a i r = H - N o o f s u r r o u n d i n g a t o m X e {F_{5}}^{+} H = \frac{1}{2} [8 + 5 - 1 + 0] = 6 (t h a t m e a n s h y b r i d i s a t i o n = s p^{3} d^{2}) L p = 6 - 5 = 1 T h a t m e a n s i t s a s q u a r e p y r a m i d s t r u c t u r e . X e F_{6} H = \frac{1}{2} [8 + 6 - 0 + 0] = 7 (t h a t m e a n s h y b r i d i s a t i o n = s p^{3} d^{3}) L p = 7 - 6 = 1 T h a t m e a n s i t s a d i s t o r t e d o c t a h e d r a l . X e {F_{8}}^{2 -} H = \frac{1}{2} [8 + 8 - 0 + 2] = 9 (t h a t m e a n s h y b r i d i s a t i o n = s p^{3} d^{3}) L p = 9 - 8 = 1 T h a t m e a n s i t s a s q u a r e a n t i p r i s m a t i c .$

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