With respect to resonance structures of CO_3^ | vedclass

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(D) Step $1$: In resonance structures, only the positions of electrons change, not the positions of atoms. Thus, statement $(c)$ is incorrect.Step $2$

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$a, b$ and $d$

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(D) Step $1$: In resonance structures, only the positions of electrons change, not the positions of atoms. Thus, statement $(c)$ is incorrect.Step $2$: The $CO_3^{2-}$ ion has three equivalent resonance structures, making all $C-O$ bonds equivalent due to resonance hybrid. Thus, $(a)$ and $(b)$ are correct.Step $3$: The formal charge on an atom is calculated as $FC = V - L - \frac{1}{2}S$. For carbon in $CO_3^{2-}$, $V=4$, $L=0$, $S=8$, so $FC = 4 - 0 - 4 = 0$. Thus, $(d)$ is correct.Step $4$: Combining these, statements $(a)$, $(b)$, and $(d)$ are correct.

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