question_answer

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

A) \[BO_{3}^{3-},\,\,CO_{3}^{2-},\,\,NO_{3}^{-}\]       

B) \[\operatorname{S}O{{_{3}^{2-}}^{~}},\,CO{{_{3}^{2-}}^{~}},\,\,NO_{3}^{-}\]

C) \[C{{N}^{-}},\,\,{{N}_{2}},\,\,C_{2}^{2-}\]

D) \[\operatorname{PO}{{_{4}^{3-}}^{~}},SO{{_{4}^{2-}}^{~}},ClO_{4}^{-}\]

Correct Answer: B

Solution :

Calculating number of electrons