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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pn201

Select the correct statement(s) about oxygen and its compounds.

A $Na X_{2} O X_{2}$ absorbs $CO X_{2}$ and releases $O X_{2}$ .
BDioxygen is paramagnetic.
CIndustrially, dioxygen is obtained by fractional distillation of liquid air.
D $KO X_{2}$ is diamagnetic.

Answer: A, B, C

O X_{2}

has two unpaired electrons (paramagnetic).

2 Na X_{2} O X_{2} + 2 CO X_{2} 2 Na X_{2} CO X_{3} + O X_{2}

.

KO X_{2}

contains

O X_{2} X^{-}

with an unpaired electron, hence paramagnetic. Liquid air is fractionated to give

O X_{2}

and

N X_{2}

.

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