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Salt A+SrarrBoverset(BaCl(2))rarr White ...

Salt `A+SrarrBoverset(BaCl_(2))rarr` White precipitate A is paramagnetic in nature and contains about 55% K. Thus, A is

A

`K _(2) O `

B

`K _(2) O _(2)`

C

`KO _(2)`

D

`K _(2) SO _(4)`

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The correct Answer is:
C
Among the given oxides, only `KO _(2) i.e.,` potassium superoxide is paramagnetic in nature. This is because peroxide ion, `O _(2) ^(-)` has three electron bond which makes it paramagnetic and coloured. Hence,A is `KO _(2)`
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