Chemical Bonding And Molecular Structure

$\text{NH}_3$ and $\text{NF}_3$ both are polar molecules

$\text{NH}_3$ and $\text{NF}_3$ both have pyramidal shape

In $\text{NH}_3$ and $\text{NF}_3$ the orbital dipole due to lone pair is in the same direction as that of resultant dipole moment of other three bonds

Dipole moment of $\text{NH}_3$ is greater than $\text{NF}_3$