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  4. The magnetic behavior of Li 2 O , Na 2 O 2 and KO 2, respectively, are

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Q. The magnetic behavior of $Li _2 O , Na _2 O _2$ and $KO _2$, respectively, are

JEE MainJEE Main 2023The s-Block Elements

Solution:

$Li _2 O \rightarrow O ^{2-} \rightarrow$ diamagnetic
$Na _2 O _2 \rightarrow O _2{ }^{2-} \rightarrow$ diamagnetic
$KO _2 \rightarrow O _2^{-} \rightarrow$ paramagnetic