Question

Commercial "10 volume" H₂O₂ is a solution with
a strength of approximately :
(a) 30% (b) 3%
(c) 1% (d) 10%

Answer 1

(d) 10%a strength of approximately : is the answer

Answer 2

(b) 3%

Explanation:

10 Volume of H2O2 means that 1L at H2O2 at STP gives 10L of oxygen at STP.

2H2O2 ---> O2 + H2O

68g of H2O2 = 22.4 L of O2 at STP

10L of O2 at STP is produced from 68 * 10 / 22.4 = 30.36g

The strength of 10 volume H2O2 = 30g/L

That is 3% H2O2 solution.

Option B is the answer.