Question

In which of the following bond angle is maximum ?

• A. $N{H}_3$
• B. ${NH}_4^{+}$
• C. $PC{l}_3$
• D. $SC{l}_2$

Answer 1

Answer: (B)

${NH}_4^{+}$

As per Valence shell electron repulsion theory (VSEPR), in a molecule, there are two types of an electron.

1. Bonding Pair

2 Non Bonding Pair or lone pair

In a molecule, bond angle decreases as no of non-bonding pair or lone pair increases as they provide repulsion to each other.

In the given question, $N{H}^4+$ has a maximum bond angle as all other have 1 lone pair in their structure, so repulsive forces increases but $N{H}^4+$ doesn't have any lone pair so it has a maximum bond angle.

Hence, the correct answer is $\left(B\right)$ $N{H}^4+$