Answer
The four double bonds.
Work Step by Step
The three C=C bonds in the aromatic ring and the C=O bond have a bond order of 2, compared to 1 for all the others.
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 8 Bonding and Molecular Structure - 8-9 Bond Properties: Order, Length, and Energy - Case Study - Questions - Page 331: 6
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