Question

The correct order of dipole moment is _____

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

$:C{H}_4$ is symmetrical $\Rightarrow$ zero dipole moment.

In NF3, moment by lone pair is opposite to bond pair moment.

[F is more electronegative than N]

In $N{H}_3$, moment by lone pair is in the direction of bond pair moment.

In water, both the moments add up.

Thus, the order is

$C{H}_4<N{F}_3<N{H}_3<H_{2}O$