99 Percentile Qs Bank for JEE MainChemistryChemical Bonding and Molecular Structure
Find out the bond order in He 2 ,   He 2 + ,   O 2 and O 2 + , respectively
Options
- A0 ,   0 . 5 ,   2 and 3
- B0 . 5 ,   0 ,   3 and 2
- C0 ,   0 . 5 ,   2 and 1
- D0 ,   0 . 5 ,   2 and 2 . 5
Correct answer
D. 0 ,   0 . 5 ,   2 and 2 . 5
Step-by-step solution
Bond   order   = bonding   electrons   - anti   bonding   electrons 2 He 2 bond order electronic configuration = 1s 2 or 1s 2 MOT configuration = σ 1 s 2 σ 1 s * 2 BO= 2 - 2 2 = 0 He 2 + bond order = electronic configuration = 1s 2 or 1s 1 MOT connfiguration= σ 1 s 2 σ 1 s * 1 BO= 2 - 1 2 = 0 . 5 O 2 bond order electronic configuration =1s 2 2s 2 2p 4 or 1s 2 2s 2 2p 4 MOT configuration= K K L L σ 2 p z 2   π 2 p x 2 =   π 2 p y 2