Question

Which of the following species has the same hybridization as $C$ in $C{H}_2=C{H}_2$ ?

• A. $C{O}_3^{2-}$
• B. $Xe{F}_4$
• C. $PC{l}_3$
• D. $I_3^{-}$

Answer 1

Answer: (A)

Hybridization is the intermixing of the atomic orbitals that have similar or comparable energies.

Hybridisation can be calculated by the electron pair number method.

$ElectronPairHybridization2sp3s{p}^{2}4s{p}^{3}5s{p}^{3}d6s{p}^3{d}^{2}7s{p}^3{d}^3$

Electron pair can be calculated as the given below.

$E.P=\frac{valenceelectronofcentralatom+monovalentatom+negativecharge-positvecharge}{2}$

For $C{O}_3^{2-}$

$E.P=\frac{4+0+2+0}{2}=3=s{p}^2$

For $Xe{F}_4$

$E.P=\frac{8+4+2+0}{2}=6=s{p}^3{d}^2$

For $PC{l}_3$

$E.P=\frac{5+3+2+0}{2}=4=s{p}^3$

For $I_3^{-}$

$E.P=\frac{7+2+1+0}{2}=5=s{p}^{3}d$

Therefore the same hybridization as carbon in the above ethene molecule is only with the carbonate ion.