Question

In which of the following is the bond angle maximum ?

• A. $N{H}_3$
• B. $N{H}_4^{+}$
• C. $PC{l}_3$
• D. $SC{l}_3$

Answer 1

Answer: (B)

$N{H}_4^{+}$

The bond angle is maximum in ammonium ion $N{H}_4^{+}$. It is equal to ${109.5}^o$ - the tetrahedral bond angle. It undergoes $s{p}^3$ hybridization.

$N{H}_3$ and $PC{l}_3$ also undergo $s{p}^3$ hybridisation, but the bond angle is less than ${109.5}^o$ as the lone pair bond pair repulsion is less than bond pair-bond pair repulsion.