Q. In which of the following pairs, the two species are iso-structure?
A) SO₃²⁻ and NO₃⁻
B) BF₃ and NF₃
C) BrO₃⁻ and XeO₃
D) SF₄ and XeF₄
Explanation
[Solution from source] BrO₃⁻ and XeO₃ each have three bond pairs and one lone pair on the central atom, so both are trigonal pyramidal. SO₃²⁻ is pyramidal but NO₃⁻ is planar; BF₃ is planar but NF₃ pyramidal; SF₄ is see-saw but XeF₄ square planar. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.