First slide

Hydrogen Peroxide

Question

The volume of 40 vol. H₂O₂ solution required to prepare 2L. of O₂ at STP is

Moderate

A

40 m.L
B

50 m.L.
C

25 m.L.
D

500 m.L.

Solution

40 volume strength of H₂O₂ solution means,
1ml of H₂O₂ solution $\overset{g i v e s}{\to}$ 40 ml of "O₂"
?? of H₂O₂ solution $\overset{g i v e s}{\to}$ 2L=2000ml 0f $O_{2}$
$\frac{2000 ml \times 1 ml}{40 ml}$ = 50ml of H₂O₂ solution
50ml of 40 vol strength of H₂O₂ solution at STP produces 2L (or) 2000ml of O₂ .

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