Answer
Lone pairs do have an effect on SO$_2$.
Work Step by Step
Sulfur has one lone pair. This lone pair pushes the bond angle closer. Instead of trigonal planar geometry, it has trigonal pyramidal geometry.
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 9 - Molecular Geometry and Bonding Theories - Exercises - Page 390: 9.19e
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