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At the same temperature and pressure, gas volumes are 7 litres, 14 litres, and 7 litres. What is their simplest volume ratio?

Answer and explanation

Correct answer: 1:2:1

The relevant concept is comparison and simplification of gas volumes measured under identical conditions. Because temperature and pressure are the same, the volumes can be compared directly; no correction or gas-law calculation is needed. The given ratio is 7:14:7. The greatest common divisor of all three terms is 7, so divide each by 7: 7/7 : 14/7 : 7/7 = 1:2:1. Therefore, option C is correct. Option A is equivalent in proportion but is not in simplest form. Option B incorrectly makes the 14-litre volume equal to 7 litres, while option D changes the relative proportions. The middle volume is twice each outer volume, exactly as represented by 1:2:1.

Related tags

ChemistryGas VolumesRatio SimplificationLaws Of Chemical CombinationClass 11 ChemistrySome Basic Concepts Of ChemistryClass 11 Mcq

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