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At the same temperature and pressure, gas volumes are 8 litres, 4 litres, and 12 litres. What is their simplest volume ratio?

Answer and explanation

Correct answer: 2:1:3

The law of combining volumes allows gas volumes at identical temperature and pressure to be compared directly. The initial ratio is 8:4:12. The greatest common divisor of these three numbers is 4. Dividing each term by 4 gives 8 ÷ 4 : 4 ÷ 4 : 12 ÷ 4 = 2:1:3. Thus option C is correct. Option A is the original ratio and has not been reduced. Option B gives a different relationship, and option D incorrectly treats all three volumes as equal. The reduced form shows that the first gas has twice the volume of the second and the third has three times the volume of the second, exactly matching the original measurements.

Related tags

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

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