Among the following ions, \( p \pi-d \pi \) overlap is present in : (A) \( \mathrm{NO}_{3}^{-} \...

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Among the following ions, \( p \pi-d \pi \) overlap is present in :
(A) \( \mathrm{NO}_{3}^{-} \)
(B) \( \mathrm{CO}_{3}^{2-} \)
(C) \( \mathrm{NO}_{2}^{-} \)
(D) \( \mathrm{PO}_{4}^{3-} \)
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