Question

The pairs of compounds which have the same molecular geometry are
I) BF\textsubscript{3}, BrF\textsubscript{3}
II) XeF\textsubscript{2}, BeCl\textsubscript{2}
III) BCl\textsubscript{3}, PCl\textsubscript{3}
IV) PCl\textsubscript{3}, NCl\textsubscript{3}

• A. I& III only
• B. II& III only
• C. I& IV only
• D. II& IV only

Hint:

Molecular geometry is determined by electron pairs (bonding + lone pairs); use VSEPR theory to predict shapes.

Answer 1

The Correct Option is D

- **BF\textsubscript{3}**: Trigonal planar
- **BrF\textsubscript{3}**: T-shaped → different geometry - **XeF\textsubscript{2}**: Linear
- **BeCl\textsubscript{2}**: Linear → same geometry ✓ - **BCl\textsubscript{3}**: Trigonal planar
- **PCl\textsubscript{3}**: Trigonal pyramidal → different geometry - **PCl\textsubscript{3}, NCl\textsubscript{3}**: Both are trigonal pyramidal → same geometry ✓