Question

Which of the following pairs of ions is isoelectronic and isostructural?

(a) CO^2-₃, NO^-₃

(b) ClO^-₃, CO^2-₃

(c) SO₃^2- , NO^-₃ 

(d) ClO^-₃ , SO₃^2- 

Answer 1

The correct option is : (a) CO^2-₃, NO^-₃ 

(d) ClO^-₃ , SO₃^2- 

Explanation:

(a) CO₃^2-  : 6 + 24 + 2 = sp² ; trigonal planar

NO^-₃ : 7 + 24 + 1: 32; sp²; trigonal Planar

Hence, these are isoelectronic as well as isostructural.

(b) ClO^-₃ : 17 + 24 + 1 = 42; sp³, trigonal pyramidal

CO^2-₃ : 6 + 24 + 2 = 32; sp²,trigonal Planar

Hence, these are neither isoelectronic nor isostructural.

(c) SO₃^2- : 16 + 24 + 2 = 42; sp³ , trigonal pyramidal

NO^-₃  : 7 + 24 + 1 = 32; sp² , trigonal planar

These are neither isoelectronic nor isostmctural

(d) ClO^-₃ : 17 + 24 + 1 = 42; sp³ , trigonal pyramidal

SO₃^2- : 16 + 24 + 2 = 42; sp³ , trigonal pyramidal