Q. Which of the following pairs of ions is isoelectronic and isostructural?
A) $CO_3^{2-}$, $NO_3^-$
B) $ClO_3^-$, $CO_3^{2-}$
C) $SO_3^{2-}$, $NO_3^-$
D) $ClO_3^-$, $SO_3^{2-}$
Explanation
[Solution] $CO_3^{2-}$ and $NO_3^-$ (32 electrons, trigonal planar) and $ClO_3^-$ and $SO_3^{2-}$ (42 electrons, pyramidal) both qualify, so options (1) and (4) are both accepted. Answer (1) / (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.