Question

Which of the following molecules does not show any resonating structures?

• A. $N{H}_3$
• B. $C{O}_3{}^{2-}$
• C. $O_3$
• D. $S{O}_3$

Answer 1

The correct option is A $N{H}_3$

Resonance is shown by the molecules which have these type of system:-

-Adjacent double bond and positive charge

-Adjacent double bond and negative charge

-Adjacent lone pair and double bond

- Adjacent double bond and free radical

-Two adjacent double bond

-Adjacent lone pair and positive charge.

$N{H}_3$ does not have any such kind of system where resonance is possible.

So the correct answer is the option [A]