MCQ
Which one of the following is paramagnetic in nature?
  • $NO$
  • B
    $\mathrm{N}_2 \mathrm{O}$
  • C
    $\mathrm{N}_2 \mathrm{O}_5$​
  • D
    All of the above

Answer

Correct option: A.
$NO$
Whenever two electrons are paired together in an orbital, or their total spin is $0$, they are diamagnetic electrons. Atoms with all diamagnetic electrons are called diamagnetic atoms.
A paramagnetic electron is an unpaired electron. $NO$ has one unpaired electron. Hence, it is paramagnetic in nature.

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