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Which statement uses multiple proportions correctly?

Answer and explanation

Correct answer: Sulfur and oxygen form SO₂ and SO₃

The law of multiple proportions applies when the same two elements form more than one compound. In SO₂ and SO₃, sulfur and oxygen are the same pair of elements, but they combine in different whole-number ratios. If the mass of sulfur is kept fixed, the masses of oxygen that combine with it are in a simple ratio, because SO₃ contains one more oxygen atom per sulfur atom than SO₂. Therefore, option A gives a genuine example of this law. Option B concerns physical mixing, while C and D do not compare compounds formed by the same two elements.

Related tags

ChemistryLaw Of Multiple ProportionsChemical CombinationLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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