Question

Among the following pair of compounds, the one that illustrates the law of multiple proportions is:

• A. $N{H}_3\text{and}NC{l}_3$
• B. $H_{2}S\text{and}S{O}_2$
• C. $C{S}_2\text{and}FeS{O}_4$
• D. $CuO\text{and}C{u}_{2}O$

Answer 1

The correct option is D $CuO\text{and}C{u}_{2}O$

The law of multiple proportions, states that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.
In $CuO$ and $C{u}_{2}O$, the $O:Cu$ is $1:1$ and $1:2$. Hence, this combination of molecules follows law of multiple proportions