Question
What is O-O bond length in ozone ?
MHT CET
Chemistry
p Block Elements (Group 15, 16, 17 & 18)
2026
MHT CET 2026 (13 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 178 pm
- B. 128 pm
- C. 256 pm
- D. 483 pm
Answer
B. 128 pm
Step-by-step solution
Ozone (O_3) is a resonance hybrid of two equivalent structures. Due to resonance, both O-O bonds in the ozone molecule are identical. The O-O bond length is intermediate between a typical O-O single bond (148 pm) and an O=O double bond (121 pm). The experimentally determined O-O bond length in ozone is 128 pm. Answer: 128 pm
Related: Chemistry — p Block Elements (Group 15, 16, 17 & 18) · All PYQ Banks