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Question

Which of the following has fractional bond order?
  1. O2+2
  2. O22
  3. F22
  4. H2

A
O2+2
B
F22
C
H2
D
O22
Solution
Verified by Toppr

Bond order=No. of Bonding electronsNo. of Antibonding electron2
(i)O2+2=1042=3
(ii)O22=1082=1
(iii)F22=1082=1
(iv)H2=212=12
As you can see, the only molecule with fractional Bond order is H2. It has a Bond order of 12 or 0.5

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