Question

In which one of the following species the central atom has the type of hybridization which is not the same as that in the other three?

• A. $S{F}_4$
• B. $I_3^{-}$
• C. $SbC{l}_5^{2-}$
• D. $PC{l}_5$

Answer 1

The correct option is C $SbC{l}_5^{2-}$

By using formula,
$\text{Electron pairs}=\frac{\text{Number of valence electrons on central atom +Number of bond formation}}{2}$
In $S{F}_4,$
$\text{Electron pairs}=\frac{6+4}{2}=5$
Hence,
$S$ has $ds{p}^3$ hybridization
In $I_3^{-},$
$\text{Electron pairs}=\frac{7+2+1}{2}=5$
Hence,
$I$ has $ds{p}^3$ hybridization
In $PC{l}_5,$
$\text{Electron pairs}=\frac{5+5}{2}=5$
Hence,
$P$ has $ds{p}^3$ hybridization
In $SbC{l}_5^{2-},$
$\text{Electron pairs}=\frac{5+5+2}{2}=6$
$Sb$ has $s{p}^3{d}^2$ hybridization