Question

The law of multiple proportions is illustrated by the pair of compounds:

• A. $Mg(OH{)}_2$ and $MgO$
• B. Water and heavy water
• C. $NaCl$ and $NaBr$
• D. $S{O}_2$ and $S{O}_3$

Answer 1

The law of multiple proportions states that if two elements form more than one compound between them, then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.

So sodium chloride and sodium bromide is the correct answer.

Conclusion: The correct option is (D) $NaCl$ and $NaBr$