Which of the following pairs does not contain | vedclass

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(C) Isoelectronic species are those that have the same number of electrons.For option $A$: $PO_4^{3-} (15+32+3=50)$,$SO_4^{2-} (16+32+2=50)$,$ClO_4^-

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$SO_3^{2-}, CO_3^{2-}, NO_3^-$

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(C) Isoelectronic species are those that have the same number of electrons.For option $A$: $PO_4^{3-} (15+32+3=50)$,$SO_4^{2-} (16+32+2=50)$,$ClO_4^- (17+32+1=50)$. These are isoelectronic.For option $B$: $CN^- (6+7+1=14)$,$N_2 (7+7=14)$,$C_2^{2-} (6+6+2=14)$. These are isoelectronic.For option $C$: $SO_3^{2-} (16+24+2=42)$,$CO_3^{2-} (6+24+2=32)$,$NO_3^- (7+24+1=32)$. These are not isoelectronic.For option $D$: $BO_3^{3-} (5+24+3=32)$,$CO_3^{2-} (6+24+2=32)$,$NO_3^- (7+24+1=32)$. These are isoelectronic.Thus,the pair in option $C$ does not contain isoelectronic species.

Which of the following pairs does not contain isoelectronic species?

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