Question

20 volume $H_{2}O_{2}$solution has a strength of about.

• A. 30%
• B. 6%
• C. 3%
• D. 10%

Answer 1

Answer: (B)

6%

Answer 2

$\because$ 22.4 litre $O_{2}$ at N.T.P. obtained by 68 gm of $H_{2}O_{2}$

1 litre $O_{2}$at N.T.P. obtained by$\frac{68}{22.4}$gm of $H_{2}O_{2}$

20 litre $O_{2}$ at N.T.P. obtained by

$\frac{68}{22.4} \times 20$gm of $H_{2}O_{2} = 60.71gm$ of $H_{2}O_{2}$

1000 ml $O_{2}$ at N.T.P. obtained by = 60.71 gm of $H_{2}O_{2}$

100 ml $O_{2}$ at N.T.P. obtained by $= \frac{60.71}{1000} \times 100 = 6.71\%$