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At the same temperature and pressure, gas volumes are 6 litres, 6 litres, and 18 litres. What is their simplest volume ratio?

Answer and explanation

Correct answer: 1:1:3

The governing principle is direct proportional comparison of gas volumes when temperature and pressure are the same. Begin with 6:6:18. The greatest common divisor of all three terms is 6. Dividing each by 6 gives 6 ÷ 6 : 6 ÷ 6 : 18 ÷ 6 = 1:1:3. Therefore option D is correct. Option A is mathematically equivalent but is not in simplest form. Option B reverses the relative size of the first and third volumes, while option C incorrectly says that 18 L equals 6 L. The final ratio clearly indicates that the first two gases have equal volumes and the third gas has three times either one.

Related tags

ChemistryLaws-Of-Chemical-CombinationCombining-VolumesClass-11Laws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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