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JEE Main levelOne or more correct optionsDifficulty 2 of 3bn082

Select all compounds that are correctly described as peroxides, with the $O X_{2} X^{2 -}$ ion (oxygen $- 1$ ).

A $Na X_{2} O X_{2}$
B $KO X_{2}$
C $BaO X_{2}$
D $MnO X_{2}$

Answer: A, C

Na X_{2} O X_{2}

(

2 Na X^{+} + O X_{2} X^{2 -}

) and

BaO X_{2}

(

Ba X^{2 +} + O X_{2} X^{2 -}

) contain peroxide ions.

KO X_{2}

has the superoxide ion

O X_{2} X^{-}

(O

- 1/2

) and

MnO X_{2}

is manganese(IV) oxide with

O X^{2 -}

.

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