Question: Among the following species, the diamagnetic molecule is:
NO
CO
$\mathrm{B}_{2}$
$\mathrm{O}_{2}$
Correct Option: , 2
Solution:
The molecules with no unpaired electrons are diamagnetic.
Since $\mathrm{CO}$ has no unpaired electron. Hence $\mathrm{CO}$ is diamagnetic.
