The volume of oxygen liberated at STP from \( 15 \mathrm{~mL} \) of 20 volume \( \mathrm{H}_{2} ...

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The volume of oxygen liberated at STP from \( 15 \mathrm{~mL} \) of 20 volume \( \mathrm{H}_{2} \mathrm{O}_{2} \) is
(A) \( 100 \mathrm{~mL} \)
(B) \( 150 \mathrm{~mL} \)
(C) \( 300 \mathrm{~mL} \)
(D) \( 200 \mathrm{~mL} \)
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