Question

CO and CO₂ illustrate the law of multiple proportions.

• A. True
• B. False

Answer 1

The correct option is A True

Law of multiple proportions:

• This law, also called Dalton's law of multiple proportions was proposed by John Dalton in 1803.
• It states that “when two elements combine to form more than one compound. The mass of one element which combines with a fixed mass of the other element, bear a simple whole-number ratio to one another”.
• Example: $\mathbf{CO}$and ${\mathbf{CO}}_{\mathbf{2}}$ are the compounds that are composed of carbon and oxygen. Carbon monoxide ($\mathbf{CO}$) contains 12 parts by mass of carbon combined with 16 parts by mass of oxygen. While carbon dioxide () is composed of 12 parts by mass of carbon ad 32 parts by mass of oxygen. Therefore the masses of oxygen that combines with the carbon are in the proportion of 16:32, which means in the simple whole-number ratio of 1:2.

Thus, the given statement is TRUE i.e. CO and CO₂ illustrate the law of multiple proportions.