Hydrogen peroxide is obtained by the electrolysis of:

water

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sulphuric acid

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hydrochloric acid

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fused sodium peroxide

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Solution

The correct option is B sulphuric acid
$H_{2} O_{2}$ is obtained by the electrolysis of a cold 50% solution of $H_{2} O_{2}$
$2 H_{2} S O_{4} \to 2 H^{+} + 2 H S O_{4}^{-}$
The electrolysis of $H S O_{4}^{-}$ gives $H_{2} O_{2}$ .

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