Question

The volume of oxygen evolved at STP, by decomposition of $0.68g{}^{\prime }20volum{e}^{\prime }$ hydrogen peroxide solution, is:

• A. $2.24mL$
• B. $22.4mL$
• C. $224mL$
• D. $2240mL$

Answer 1

The correct option is C $224mL$

$\begin{array}{c}\text{At STP}68g{H}_2{O}_2\text{produced}{O}_2=22400ml\\ \\ \text{At STP}0.68g{H}_2{O}_2\text{will produce}\\ \\ O_2=\frac{22400\times 0.68}{68}=224mL\end{array}$