Chemical Bonding And Molecular Structure Question 464
Question: Which one of the following molecules is paramagnetic-
Options:
A) $ N_2 $
B) NO
C) CO
D) $ O_3 $
Show Answer
Answer:
Correct Answer: B
Solution:
- The molecular orbital configuration of the molecules given is Total no. of electrons in $ NO=7( N )+8( O ) $
$ =15 $
Hence E.C. of NO $ =KK\sigma {{(2s)}^{2}}\sigma *{{(2s)}^{2}}\sigma {{(2p_{z})}^{2}} $
$ \pi {{(2p_{x})}^{2}}=\pi {{(2p_{y})}^{2}}\pi *{{(2p_{x})}^{1}}=\pi {{(2p_{y})}^{0}} $ Due to presence of one unpaired electron NO is paramagnetic. Except NO all are diamagnetic due to absence of unpaired electrons.
