Which molecule has a bond order of 1.5 due to resonance?
In O₃, resonance between two structures (one double, one single bond) averages the bond order to 1.5 per O-O bond. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.
