Question

A pair of compounds which is an illustration of law of multiple proportions is:

• A. $H_{2}O$ and $D_{2}O$
• B. $NaOH$ and $KOH$
• C. $NaCl$ and $NaBr$
• D. $CO$ and ${CO}_2$

Answer 1

Answer: (D)

$CO$ and ${CO}_2$

Carbon combines with oxygen in $1:1$ ratio to form carbon monoxide and $1:2$ ratio to form carbon dioxide.