Question

Which molecule does not have net zero dipole moment?

• A. $C{O}_2$
• B. $H_2$
• C. $C{l}_2$
• D. $H_{2}O$

Answer 1

The correct option is D

$H_{2}O$

$H_2$ and $C{l}_2$ are covalent molecules made up of same elements. This, they will not have any net dipole moment.

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

$O$ = $C$ = $O$

Water looks like

Thus, water will have dipole moment because of higher electronegativity of O.