Question
Chemistry Question on Chemical bonding and molecular structure
Which one of the following molecules is paramagnetic ?
A
N2
B
NO
C
CO
D
O3
Answer
NO
Explanation
Solution
The molecular orbital configuration of the molecules given is Total no. of electrons in NO.
=7(N)+8(0)=15
Hence E.C. of NO
=K[σ(2s)]2[σ∗(2s)]2[σ2pz]2
[π(2px)]2[π(2py)]2[π∗(2px)]1
Due to presence of one unpaired electron NO is paramagnetic Except NO all are diamagnetic due to absence of unpaired electrons.
So, the correct option is (B): NO.