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QJEEM23Ch9e8a: JEE Main 2023 Chemistry - Class 11 JEEM23Ch9e8a Solution: The magnetic behaviour of and , respectively, are :

The magnetic behaviour of $\mathrm{Li_2O,Na_2O_2}$ and $\mathrm{KO_2}$ , respectively, are :

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\mathrm{Li}_{2} \mathrm{O} \rightarrow \mathrm{O}^{2-} \rightarrow

diamagnetic

\mathrm{Na}_{2} \mathrm{O}_{2} \rightarrow \mathrm{O}_{2}^{2-} \rightarrow

diamagnetic

\mathrm{KO}_{2} \rightarrow \mathrm{O}_{2}^{-} \rightarrow

paramagnetic