Question

Which of the following molecules/species is polar ?

• A. $O_3$
• B. $N{O}_2^{+}$
• C. Para-dichlorobenzene
• D. None of these

Answer 1

The correct option is A $O_3$

A) Ozone is a V-shaped molecule and has a non zero dipole moment. Hence, it is polar in nature.

B) $N{O}_2^{+}$ is linear in structure like $C{O}_2$ and has zero dipole moment as the bond dipoles cancel each other. Hence, it is non-polar in nature.

C) Para-dichlorobenzene has zero dipole moment as bond dipoles cancel each other. Hence, it is non-polar in nature.