Q. Which of the following molecules has trigonal planar geometry ?
A) IF₃
B) PCl₃
C) NH₃
D) BF₃
Explanation
[Solution from source] BF₃ has three bond pairs and no lone pair on boron (sp²), so it is trigonal planar. PCl₃ and NH₃ are pyramidal (one lone pair) and IF₃ is T-shaped (two lone pairs). Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.