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100 ml of oxygen at STP will be obtained from 5 ml of

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100 ml of oxygen at STP will be obtained from 5 ml of

(a) 20 vol H2O2

(b) 50 vol H2O2

(c) 10 vol H2O2

(d) 30 vol H2O2

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Correct option is (a) 20 vol H2O2

\(H_2O_2 \longrightarrow H_2O + \frac 12 O_2\)

Vol strength = Volume of O2 liberated at STP / Volume of H2O2 solution

= 100/5

= 20

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