Question

Which of the following has the highest dipole moment?

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

Answer 1

The correct option is A $N{H}_3$

The dipole moment of $N{H}_3$ is the highest among the given molecules. This is because, the electronegativity difference between the bonded atoms is the highest in $N{H}_3$ (because the electronegativity of $N$ is the highest among $N,P,Sb$ and $As$ atoms).