In which of the following ions is ppi - dpi o | vedclass

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(B) In $PO_4^{3-}$,the central atom is Phosphorus $(P)$,which has vacant $d$-orbitals available for bonding. Oxygen atoms have $p$-orbitals that can o

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$PO_4^{3-}$

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(B) In $PO_4^{3-}$,the central atom is Phosphorus $(P)$,which has vacant $d$-orbitals available for bonding. Oxygen atoms have $p$-orbitals that can overlap with the $d$-orbitals of Phosphorus to form $p\pi - d\pi$ bonds. In $NO_3^-$,$CO_3^{2-}$,and $NO_2^-$,the central atoms are Nitrogen $(N)$ and Carbon $(C)$,which belong to the second period and do not have $d$-orbitals. Therefore,only $PO_4^{3-}$ exhibits $p\pi - d\pi$ overlap.

In which of the following ions is $p\pi - d\pi$ overlap present?

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Reason : Atoms rotate freely about pi $(\pi)$ bond.

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