Q. In which of the following molecules / ions BF₃, NO₂⁻, NH₂⁻ and H₂O, the central atom is sp² hybridized?
A) NH₂⁻ and H₂O
B) NO₂⁻ and H₂O
C) BF₃ and NO₂⁻
D) NO₂⁻ and NH₂⁻
Explanation
[Solution from source] BF₃ has three bond pairs and no lone pair, and NO₂⁻ has two σ bonds and one lone pair on N; both have three electron domains, so sp². NH₂⁻ and H₂O each have two bond pairs and two lone pairs (four domains), so they are sp³. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.