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Chemistry Question on Structure of atom

Of the following sets which one does not contain isoelectronic species ?

A

BO33−, CO32−, NO3−BO^{3-}_{3}, \,CO^{2-}_{3}, \,NO_{3}^{-}

B

SO32−, CO32−, NO3−SO^{2-}_{3}, \,CO^{2-}_{3}, \,NO_{3}^{-}

C

CN−,N2,C22−CN^{-}, N_{2}, C^{2-}_{2}

D

PO43−, SO42−, CIO4−PO^{3-}_{4}, \,SO^{2-}_{4}, \,CIO_{4}^{-}

Answer

SO32−, CO32−, NO3−SO^{2-}_{3}, \,CO^{2-}_{3}, \,NO_{3}^{-}

Explanation

Solution

Thus (a) BO33−, CO2−, NO3BO^{3-}_3,\, CO^{2-},\, NO_3 are isoelectronic. (b) SO32−, CO32−, NO3−SO^{2-}_3,\, CO_3^{2-},\, NO_3^- are not isoelectronic.