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Chemical Bonding and Molecular Structure
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06/09/2021 10:25 am
Topic starter
Which one of the following molecules is paramagnetic?
(a) N2
(b) NO
(c) CO
(d) O3
1 Answer
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06/09/2021 10:32 am
Correct answer: (b) NO
Explanation:
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
= KKσ(2s)2σ*(2s)2 σ(2pz)2
π(2px)2 = π(2py)2π*(2px)1 = π*(2py)o
Due to presence of one unpaired electron NO is paramagnetic.
Except NO all are diamagnetic due to absence of unpaired electrons.