Question

The electronic structure of the $S{O}_2$ molecule is best represented as a resonance hybrid of ____ equivalent structures.

• A. 4
• B. 2
• C. This molecule does not exhibit resonance.
• D. 3

Answer 1

The correct option is B 2

The electronic structure of the SO2 molecule is best represented as a resonance hybrid of two equivalent structures.
SO2 molecule has two different types of pi bonds (p$\pi -$ p$\pi$) and (p$\pi -$ d$\pi$) . But even then both of S-O bonds are identical. Hence, SO2 molecule is resonance hybrid of two structures.