Which one of the following molecules is paramagnetic?

Step-by-step solution

As per Molecular orbital theory, N 2   14   electrons all paired electrons, so diamagnetic. N 2 ⇒ σ 1 s 2 < σ * 1 s 2 < σ 2 s 2 < σ * 2 s 2 < π 2 p x 2 = π 2 p y 2 < σ 2 p z 2 O 3 - 24 electrons and diamagnetic.​ CO   14   electrons all paired so, diamagnetic. CO ⇒ σ 1 s 2 < σ * 1 s 2 < σ 2 s 2 < σ * 2 s 2 < π 2 p x 2 = π 2 p y 2 < σ 2 p z 2 NO   15   electrons one