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In two compounds fixed 11 grams A combines with 20 grams and 40 grams B. What is the simple ratio of B?

Answer and explanation

Correct answer: 1:2

The mass of A is fixed at 11 g in both compounds, so compare the masses of B: 20:40. Dividing both terms by 20 gives 1:2. The ratio 2:1 is the reversed ratio. Exam tip: identify the element with fixed mass and reduce the masses of the other element to their simplest ratio.

Related tags

ChemistryLaws Of Chemical CombinationMultiple ProportionsMass RatioClass 11Some Basic Concepts Of ChemistryClass 11 Mcq

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