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4.Chemical Bonding and Molecular Structure
hard
If the magnetic moment of a dioxygen species is $1.73 \;B.M$, it may be
A
$\mathrm{O}_{2}^{-}$ or $\mathrm{O}_{2}^{+}$
B
$\mathrm{O}_{2}$ or $\mathrm{O}_{2}^{+}$
C
$\mathrm{O}_{2}$ or $\mathrm{O}_{2}^{-}$
D
$\mathrm{O}_{2}, \mathrm{O}_{2}^{-}$ or $\mathrm{O}_{2}^{+}$
(JEE MAIN-2020)
Solution
$\begin{array}{|c|c|c|} \hline & \text { unpaired electron } & \text { magnetic moment } \\ \hline O _{2}^{\oplus} & 1 & 1.73 B . M \\ \hline O _{2}^{\ominus} & 1 & 1.73 B . M \\ \hline O _{2} & 2 & 2.83 B.M \\ \hline \end{array}$
Standard 11
Chemistry
