s-Block ElementsHard

Question

Peroxide ion is present in :

Options

A.K₂O₂

B.CaO

C.Li₂O

D.BaO₂

Solution

BaO₂ exists as Ba²⁺ and O₂^2- and K₂O₂ exists as K⁺ and O₂^2-, therefore, O₂^2- is peroxide ion.

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