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At the same temperature and pressure, gas volumes are 15 litres, 5 litres, and 10 litres. What is their simplest volume ratio?

Answer and explanation

Correct answer: 3:1:2

For gases measured at the same temperature and pressure, the volume ratio is obtained by reducing the measured volumes by their common factor. The initial ratio is 15:5:10. The greatest common divisor of 15, 5, and 10 is 5. Dividing each term by 5 gives 3:1:2. Therefore option A is correct. Option B is the original, unreduced ratio and does not satisfy the word simplest. Option C changes the order and values, while option D incorrectly claims that all volumes are equal. The result also has a clear physical interpretation: the first gas has three times the volume of the second, and the third has twice the volume of the second.

Related tags

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

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