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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)`

Text Solution

Verified by Experts

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 bonds which makes it paramagnetic and coloured.
`underset("Oxide ion")O^(2-) underset("Peroxide ion").^(-)O-O^(-) underset("Superoxide ion")[O-=O]^(-)`
Hence, A is `KO_(2)`.
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