Which of the following resonating structures | vedclass

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(A) The stability of resonating structures is determined by several factors:$1$. Structures with more covalent bonds are more stable.$2$. Structures w

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$:N \equiv N - \ddot{O}:^-$

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(A) The stability of resonating structures is determined by several factors:$1$. Structures with more covalent bonds are more stable.$2$. Structures with less charge separation are more stable.$3$. Negative charge should reside on the more electronegative atom $(O)$ and positive charge on the less electronegative atom $(N)$.In the case of $N_2O$,the structure $:N \equiv N - \ddot{O}:^-$ satisfies these conditions best,as it has the maximum number of covalent bonds and the negative charge is on the oxygen atom,making it the most contributing structure.

Which of the following resonating structures of $N_2O$ is the most contributing?

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Given that:
$(i) \Delta_f H^o$ of $N_2O$ is $82 \ kJ \ mol^{-1}$
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The resonance energy of $N_2O$ is $...... \ kJ \ mol^{-1}$.

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