Question

Among the following molecules/ions, what is the correct order of increasing s-character (in percentage) in the hybrid orbitals?
$I.CO_{3}^{ 2 -}$ $II.XeF_{4}$ $III.I_{3}^{-}$ $IV.NCl_{3}$ $V.BeCl_{2}$

• A. $II < III < IV < I < V$
• B. $II < IV < III < V < I$
• C. $III < II < I < V < IV$
• D. $II < IV < III < I < V$

Answer 1

Answer: (A)

$C O_{3}^{2 -} \rightarrow s p^{2} \rightarrow \%s=33.33\%$
$X e F_{4} \rightarrow s p^{3}d^{2} \rightarrow \%s=16.67\%$
$I_{3}^{-} \rightarrow s p^{3}d \rightarrow \% \, s=20\%$
$N C l_{3} \rightarrow s p^{3} \rightarrow \% \, s=25\%$
$B_{e}C l_{2} \rightarrow sp \rightarrow \% \, s=50\%$