sblock Elements 1 Question 34
34. The oxide that gives $\mathrm{H}_2 \mathrm{O}_2$ on treatment with a dilute acid is
(1985, 1M)
(a) $\mathrm{PbO}_2$
(b) $\mathrm{Na}_2 \mathrm{O}_2$
(c) $\mathrm{MnO}_2$
(d) $\mathrm{TiO}_2$
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Answer:
Correct Answer: 34. (b)
Solution: Sodium peroxide on treatment with dilute acid gives $\mathrm{H}_2 \mathrm{O}_2$
$$ \mathrm{Na}_2 \mathrm{O}_2+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{Na}_2 \mathrm{SO}_4+\mathrm{H}_2 \mathrm{O}_2 $$
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