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# Among the following species,

Question:

Among the following species, the diamagnetic molecule is

1. $\mathrm{O}_{2}$

2. $\mathrm{NO}$

3. $\mathrm{B}_{2}$

4. $\mathrm{CO}$

Correct Option: , 4

Solution:

$\mathrm{O}_{2}, \mathrm{NO}, \mathrm{B}_{2}$ are paramagnetic according to M.O.T. where as $\mathrm{CO}$ is diamagnetic.