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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3bn202

Select ALL correct name-formula pairs.

A $Na X_{2} O X_{2}$ : sodium peroxide
B $KO X_{3}$ : potassium ozonide
C $KO X_{2}$ : potassium peroxide
D $Mg X_{3} N X_{2}$ : magnesium nitride

Answer: A, B, D

Na X_{2} O X_{2}

has

O X_{2} X^{2 -}

(peroxide);

KO X_{3}

has

O X_{3} X^{-}

(ozonide);

Mg X_{3} N X_{2}

has

N X^{3 -}

(nitride).

KO X_{2}

contains

O X_{2} X^{-}

, which is superoxide, so 'potassium peroxide' is wrong.

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