Question

Which of the following statements is false regarding the $SO_3$ molecule?

• A. Sulphur can expand its octet to reduce formal charges
• B. The $S — O$ bond is polar
• C. The $O-S-O$ bond angle is $104^{\circ}$
• D. It is a non-polar molecule

Answer 1

Answer: (C)

$SO _{3}$ has trigonal planar shape having $O -S-O$ bond angle $120^{\circ}$ (no lone pair at $S$ ), $S$ can expand its octet to reduce formal charges. Since $S$ and $O$ have different electronegativities, $S$ - $O$ bond is polar but overall molecule is non-polar.