JEE MAIN - Chemistry (2023 - 30th January Evening Shift - No. 15)

The strength of 50 volume solution of hydrogen peroxide is ______ $\mathrm{g} / \mathrm{L}$ (Nearest integer).

Given:

Molar mass of $\mathrm{H}_{2} \mathrm{O}_{2}$ is $34 \mathrm{~g} \mathrm{~mol}^{-1}$

Molar volume of gas at $\mathrm{STP}=22.7 \mathrm{~L}$

Answer

150

$$\mathrm{H_2O_2\longrightarrow H_2O+\frac{1}{2}O_2}$$

$$\frac{50}{22.7}$$

$$\therefore$$ Moles of $$\mathrm{H_2O_2}$$ in solution $$=\frac{50}{22.7}\times2$$

$$\therefore$$ Strength $$=\frac{\frac{50\times2}{22.7}\times34}{1}=149.78\approx150$$