Question

Which of the following molecules has trigonal planer geometry

• A. $IF_{3}$
• B. $PCl_{3}$
• C. $NH_{3}$
• D. $BF_{3}$

Answer 1

Answer: (D)

$BF_{3}$

Answer 2

No**.** of e^– pair$= 3 + \frac{1}{2}\lbrack 3 - 3\rbrack$ =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.