The oxide that gives `H_(2)O_(2)` on treatment with a dilute acid isA. – InterviewSolution

InterviewSolution

1.	The oxide that gives `H_(2)O_(2)` on treatment with a dilute acid isA. `PbO_2`B. `Na_2 O_2`C. `MnO_2`D. `TiO_2`
Answer» Correct Answer - B Only true peroxides which have `O-O-bond` give hydrogen perxide with dilute acids. `Na_(2) O_(2) + H_(2) SO_(4) rarr Na_(2) SO_(4) + H_(2) O_(2)` Note : (i) But peroxide with conc. Acids leberates `H_(2) O_(2)` and `O_(2)`, e.g. `BaO_(2) + H_(2) SO_(4) (dil.) rarr BaSO_(4) + H_(2) O_(2)` `BaO_(2) + 2H_(2) SO_(4) (conc.) rarrr 2 BaSO_(4) + 2 H_(2) O_(2) + O_(2)` (ii) Superoxides (e.g., `KO_(2), RbO_(2), CsO_(2))` react with water to give `H_(2) O_(2)` and `O_(2)`. `2 KO_(2) + 2H_(2) O rarr 2 KOH + H_(2) O_(2) + O_(2)`.

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