JEE Main202126 Aug 2021Evening ShiftChemistryChemical Bonding and Molecular StructureActual
The bond order and magnetic behaviour of O 2 - ion are, respectively :
Options
- A1 . 5 and diamagnetic.
- B1 . 5 and paramagnetic.
- C2 and diamagnetic.
- D1 and paramagnetic
Correct answer
B. 1 . 5 and paramagnetic.
Step-by-step solution
O 2 - (Total electron = 17 ) Bond order = 1 . 5 , Paramagnetic σ 1   s 2 , σ ⋆ 1   s 2 , σ 2   s 2 , σ ⋆ 2   s 2 , σ 2 P z 2 , π 2 P x 2 = π 2 P y 2 , π * 2 P x 2 = π * 2 P y 1 , σ ⋆ 2 P z 0 Number of unpaired electron = 1 Bond order = n b - n a 2 = 10 - 7 2 = 1 . 5