Q. Which of the following has the minimum bond length?
A) O₂
B) O₂⁺
C) O₂⁻
D) O₂²⁻
Explanation
[Solution from source] MO bond orders: O₂⁺ 2.5, O₂ 2, O₂⁻ 1.5, O₂²⁻ 1. Bond length decreases as bond order increases, so O₂⁺ has the shortest bond. Adding electrons fills π* orbitals and lengthens the bond. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.