(a) $Na_{2}O_{2} + \ H_{2}SO_{4}\ \ \overset{\ \ \ \ \ Ice\ cold\ \ \ \ \ \ }{\rightarrow}\ Na_{2}SO_{4} + \ H_{2}O_{2}$ $\therefore H_{2}O_{2}$ is formed by reaction of $Na_{2}O_{2}$ on dil $H_{2}SO_{4}$
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