Question

How many of the following molecules / ions have a trigonal planar structure? 
\( \text{BO}_3^{3-}, \, \text{NH}_3, \, \text{PCl}_3, \, \text{BCl}_3, \, \text{ClF}_3, \, \text{XeO}_3 \)

• A. 5
• B. 2
• C. 4
• D. 3

Hint:

Trigonal planar molecules have 3 bonding pairs and no lone pairs around the central atom (AX\(_3\) type).

Answer 1

The Correct Option is B

- \( \text{BO}_3^{3-} \): Trigonal planar
- \( \text{NH}_3 \): Trigonal pyramidal
- \( \text{PCl}_3 \): Trigonal pyramidal
- \( \text{BCl}_3 \): Trigonal planar
- \( \text{ClF}_3 \): T-shaped
- \( \text{XeO}_3 \): Pyramidal
Only \( \text{BO}_3^{3-} \) and \( \text{BCl}_3 \) have trigonal planar geometry.