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A student says CO and CO₂ are only an example of definite proportions. What is a better answer?

Answer and explanation

Correct answer: Their comparison shows multiple proportions

The governing concept is the law of multiple proportions. CO and CO₂ are two different compounds formed by the same two elements, carbon and oxygen. In CO, one fixed amount of carbon combines with a certain amount of oxygen; in CO₂, the same amount of carbon combines with twice that amount of oxygen. The oxygen masses therefore occur in a simple whole-number ratio of 1:2, demonstrating multiple proportions. Option A is correct. Each compound separately also has a definite composition, but comparing the two compounds reveals the stronger and more specific evidence for the law of multiple proportions. They are not mixtures.

Related tags

ChemistryMultiple ProportionsCarbon OxidesLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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