Question

Which of these has zero net dipole moment?

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

$N{H}_3$ has net dipole moment because $N$ is more electronegative than $H$.

$N{F}_3$ also has dipole moment in the opposite direction as compared to $N{H}_3$.

$C{O}_2$ is a linear symmetrical molecule. Thus, it will not have any net dipole moment.

$O$ = $C$ = $O$.