MHT CET2012ChemistryChemical Bonding and Molecular Structure
Which of the following species has highest bond energy?
Options
- AO ₂²⁻
- BO ₂⁺
- CO ₂⁻
- DO ₂
Correct answer
A. O ₂²⁻
Step-by-step solution
O ₂²⁻=K K^ 2 s², ^ * 2 s², 2 p_ z ², 2 p_ x ², 2 p_ y ² ^ * 2 p_ x ², 2 p_ y ² Bond order = N_ b -N_ a 2 = 8-6 2 =1 (b) O ₂⁺=K K^ 2 s², ^ * 2 s², 2 p_ z ², 2 p_ x ²= 2 p_ y ² ^ 2 p_ x ¹ Bond order = 8-3 2 =2.5 (c) O ₂⁻=K K^ 2 s², ^ 2 s², 2 p_ z ², 2 p_ x ² 2 p_ y ² 2 p_ x ² 2 p_ y ^ * Bond order = 8-5 2 =1.5 (d) O ₂=K K^ 2 s², ^ 2 s², 2 p_ z ², 2 p_ x ² 2 p_ y ² 2 p_ x ^ * 2 p_ y ¹ Bond order = 8-4 2 =2 : Bond energy 1 Bond order O ₂²⁻ has highest bond energy.