Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The electronegativity of $\mathrm{N}$ is greater than that of ${\mathrm{H}}_{\text{in }}{\mathrm{NH}}_3$, but in ${\mathrm{NF}}_3$, the electronegativity of $\mathrm{F}$ is greater than that of $\mathrm{N}$. In ${\mathrm{NH}}_3$, the atomic dipole and bond dipole are in the same direction, whereas in ${\mathrm{NF}}_3$, these are in opposite directions.
Related Theory The ammonia molecule has a permanent electric dipole moment equal to 1. $47\mathrm{D}$. A Caution The larger the difference in electronegativity, the larger the dipole moment.