O2 is paramagnetic and F2 has the highest bond length among the given diatomic compounds.
- C2, N2 and F2 have no unpaired electrons, so they are diamagnetic in nature.
- Only O2 has unpaired electrons in it, so it is paramagnetic in nature.
- Since F atom is very small in size, there is greater electronic repulsion between the F atoms.
- Hence they repel each other and bond length increases.
- So, F2 has the highest bond length among them.