Question

The strength of 20 volume of $H_2{O}_2$ is :

• A. $13.6\text{g/L}$
• B. $60.7\text{g/L}$
• C. $160\text{g/L}$
• D. $20.2\text{g/L}$

Answer 1

The correct option is B $60.7\text{g/L}$

$\begin{array}{ccccc}2H_2{O}_2& \to & 2H_{2}O& +& O_2\\ 2\times 34=68\text{g}& & & & 22.4\text{L at S.T.P}\end{array}$
$22.4\text{L}$ of $O_2$ at S.T.P is produced from $H_2{O}_2=68\text{g}$
$\therefore 20\text{L}$ of $O_2$ at S.T.P, is produced from
$H_2{O}_2=\frac{68\times 20}{22.4}=60.7\text{g}$
Hence, strength of $H_2{O}_2$ in 20 volume $H_2{O}_2=60.7\text{g/L}$