Question

The strength of ${H_2O_2}$ (in g/L) in 11.2 volume solution of ${H_2O_2 }$ is

• A. 17
• B. 51
• C. 34
• D. 85

Answer 1

Answer: (C)

34

Answer 2

By definition, ${1 \, L}$ of ${11.2}$ volume solution of ${H_2O_2}$ on decomposition gives ${11.2\, L}$ of oxygen at ${NTP}$
{\underset{\mathrm{2 \times 34 = 68 , g}}{{H_2O_2}}-> 2H_2O + O_2 }
22.4 L at NTP
Hence 11.2 L of oxygen will be obtained from
${H_2O_2 = \frac{68}{22.4} \times 11.2 = 34 \,g}$
$\therefore$ Strength of 11.2 volume of solution
${= 34\, g/L}$