Question

The geometrical shapes of $XeF _{5}^{+}, XeF _{6},$ and $XeF _{8}{ }^{2-}$ respectively are

• A. trigonal bipyramidal, octahedral, and square planar
• B. square-based pyramidal, distorted octahedral, and octahedral
• C. planar pentagonal, octahedral, and square anti prismatic
• D. square-based pyramidal, distorted octahedral, and square antiprismatic

Answer 1

Answer: (D)

Number of electron pair in $XeF _{5}^{+}=\frac{1}{2}(8+5-1+0)=6$

$ \Rightarrow s p^{3} d^{2}:$ Square-based pyramidal

Number of electron pair in $XeF _{6}=\frac{1}{2}(8+6-0+0)=7$

$\Rightarrow s p^{3} d^{3} ;$ distorted octahedral In $XeF _{8}^{2-}$,

Number of electron pair in $=\frac{1}{2}(8+8+2)=9$