Which of the following cannot be represented by resonance structures?

Which of the following compounds does not exhibit the resonance effect?

The correct stability order of the following resonance structures of $CH_3-CH=CH-CHO$ is:

Given that:
$(i) \Delta_f H^o$ of $N_2O$ is $82 \ kJ \ mol^{-1}$
$(ii)$ Bond energies of $N \equiv N, N = N, O = O$ and $N = O$ are $946, 418, 498$ and $607 \ kJ \ mol^{-1}$ respectively.
The resonance energy of $N_2O$ is $...... \ kJ \ mol^{-1}$.

Compare the relative stability of the following resonating structures:

Draw the resonating structures of $(A)$ Ozone molecule $(O_3)$ and $(B)$ Nitrate ion $(NO_3^-)$.