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Hydrogen Peroxide

In lab H 2 O ...

Question

In lab $H_{2} O_{2}$ is prepared by

A

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B

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C

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D

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Solution

The correct option is A

$B a O_{2} + H_{2} S O_{4} - - - > B a S O_{4} + H_{2} O_{2}$ . This is laboratory method for preparation of $H_{2} O_{2}$ . But the $B a S O_{4}$ formed is a thick precipitate and deposits on top of $B a O_{2}$ and prevents further reaction with it. Therefore $H_{2} C O_{3}$ or $H_{3} P O_{4}$ are used instead of $H_{2} S O_{4} .$

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