Question

The species in which the central atom uses $s{p}^2$-hybrid orbitals in its bonding is:

• A. $P{H}_3$
• B. $N{H}_3$
• C. $C{H}_3^{+}$
• D. $Sb{H}_3$

Answer 1

Answer: (C)

In $C{H}_3^{+}$, carbon atom is in $s{p}^2$ -hybridized state
$H=\frac{1}{2}(V+X-C+A)$
(a) $P{H}_3=\frac{1}{2}(5+3)=4$
$\Rightarrow s{p}^3$
(b) $N{H}_3=\frac{1}{2}(5+3)=4$
$\Rightarrow s{p}^3$
(c) $C{H}_3^{+}=\frac{1}{2}(4+3-1)=3$
$\Rightarrow s{p}^2$
(d) $Sb{H}_3=\frac{1}{2}(5+3)=4$
$\Rightarrow s{p}^3$