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In a gaseous reaction 2 litres gas A and 3 litres gas B form 2 litres gas C. What is the ratio?

Answer and explanation

Correct answer: 2:3:2

The direct answer is option A, 2:3:2. For a gaseous reaction, write the volumes in the same order as the substances are named: gas A, gas B, and gas C. Their given volumes are 2 L, 3 L, and 2 L. Thus the ratio is 2:3:2. It is already a simple whole-number ratio because 2, 3, and 2 have no common factor greater than 1. Option A is correct. Option B, 1:3:2, incorrectly changes the volume of A from 2 L to 1 L without dividing every term by the same number. Option C, 2:1:2, changes B incorrectly. Option D, 3:2:1, reverses and rearranges the values, so it does not follow the stated order. The numbers here describe gaseous-volume proportions, not necessarily the balanced chemical equation unless temperature and pressure conditions are understood to be the same. Memory cue: copy the three volumes in question order before forming the ratio.

Related tags

Chemistry Laws Chemical CombinationLaws Of Chemical CombinationSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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