Question

Hydrogen and oxygen combine to form $H_2{O}_2$ and $H_{2}O$ containing $5.93\%$ and $11.2\%$ hydrogen respectively. The data illustrates the:

• A. law of conservation of mass
• B. law of constant proportion
• C. law of reciprocal proportion
• D. law of multiple proportion

Answer 1

The correct option is D law of multiple proportion

When two element $A$ and $B$ from two different compounds, the masses of element $B$ that combine with a fixed mass of element $A$ can be expressed as a ratio of small whole numbers.

In $H_2{O}_2$, $H=5.93$ hence $O=94.07$

The ratio of $O$ and $H$ is $=\frac{5.93}{94.07}=0.0630$

Again,in $H_{2}O$, $H=11.2$ so $O=88.8$

The ratio of $O$ and $H$ is $=\frac{11.2}{88.8}=0.126$

And the total ratio is $\frac{0.126}{0.0630}=2$

Hence answer is option $D$.