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The mass percent of $H_{2} O_{2}$ in '30 volume $H_{2} O_{2}$ ' is

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4.56%

9.11%

11.39%

13.67%

answer is B.

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Detailed Solution

2H₂O₂→O₂+2H₂O

68gm of H₂O₂ gives 22.4litres of O₂

∴ 30L of O₂ is produced by68×30g / 22.4 i.e. 91.07g H₂O₂

∴ Strength of 30V H₂O₂ solution is 91.07gL−1.

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