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In two compounds fixed 6 grams A combines with 7 grams and 28 grams B. What is the simple ratio of B?

Answer and explanation

Correct answer: 1:4

The mass of A is fixed at 6 g in both compounds, so compare the masses of B: 7:28. Dividing both terms by 7 gives 1:4. Option 4:1 is the reverse ratio, so it is incorrect. Exam tip: in multiple-proportion questions, first identify the element whose mass is kept fixed.

Related tags

ChemistryChemical CombinationMultiple ProportionsMass RatioClass 11Laws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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