Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE

Consider the following molecules/ions having no lone pairs on the central atom: (A) \( \text{HgCl}_2 \) — Linear geometry with bond angle \( 180^\circ \) (B) \( \text{BF}_3 \) — Trigonal planar geometry with bond angle \( 120^\circ \) (C) \( \text{NH}_4^+ \) — Tetrahedral geometry with bond angle \( 109.5^\circ \) (D) \( \text{SF}_6 \) — Octahedral geometry with bond angle \( 90^\circ \) Which of the above pairs/descriptions are correct according to VSEPR theory?

1. (A) and (B) only
2. (A), (B), (C) and (D)
3. (A), (B) and (D) only
4. (B) and (C) only