JEE MAIN - Chemistry (2023 - 29th January Morning Shift - No. 2)
The magnetic behaviour of $$\mathrm{Li_2O,Na_2O_2}$$ and $$\mathrm{KO_2}$$, respectively, are :
paramagnetic, paramagnetic and diamagnetic
paramagnetic, diamagnetic and paramagnetic
diamagnetic, paramagnetic and diamagnetic
diamagnetic, diamagnetic and paramagnetic
Explanation
$\mathrm{Li}_{2} \mathrm{O} \rightarrow \mathrm{O}^{2-} \rightarrow$ diamagnetic
$\mathrm{Na}_{2} \mathrm{O}_{2} \rightarrow \mathrm{O}_{2}^{2-} \rightarrow$ diamagnetic
$\mathrm{KO}_{2} \rightarrow \mathrm{O}_{2}^{-} \rightarrow$ paramagnetic
$\mathrm{Na}_{2} \mathrm{O}_{2} \rightarrow \mathrm{O}_{2}^{2-} \rightarrow$ diamagnetic
$\mathrm{KO}_{2} \rightarrow \mathrm{O}_{2}^{-} \rightarrow$ paramagnetic
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