In the Merck's process, the reagents involved for the preparation of hydrogen peroxide are:

B a O_{2}, H C l

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N a_{2} O_{2}, H_{2} S O_{4}

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B a_{2} O_{2}, H_{2} C O_{3}

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P b O_{2}, H_{2} O

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Solution

The correct option is A $N a_{2} O_{2}, H_{2} S O_{4}$
In laboratory, $H_{2} O_{2}$ is prepared by Merck's process. It is prepared by adding calculated amounts of sodium peroxide to ice cold dilute $(20 %)$ solution of $H_{2} S O_{4}$ .

$N a_{2} O_{2} + H_{2} S O_{4} \to N a_{2} S O_{4} + H_{2} O_{2}$ .

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