Question

Which of the following molecules has trigonal planer geometry

• A. IF₃
• B. PCl₃
• C. NH₃
• D. BF₃

Answer 1

The correct option is D

BF₃

No. of $e^{-}$ pair = $3+\frac{1}{2}[3-3]=0$
No. of $e^{-}$ pair =3 + 0

No. of atom bonded to the central atom =3

In case of 3, 3 geometry is Trigonal planar.