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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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Knowledge Check

  • Salt A + S to B overset(BaCl _(2)) to 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
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    D
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  • Salt A+S overset(BaCl_(2))(to) white ppt. A is paramangnetic is nature and contains about 55% K. Thus, A is:

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    `K_(2)O`
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  • Salt P+ H_(2)SO_4rarrRoverset(BaCl_2)rarr white ppt (P) is paramagnetic in nature and contains about 55% K .So (P) is

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