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In two compounds 10 grams A combines with 12 grams and 36 grams B. What is the simple ratio of B?

Answer and explanation

Correct answer: 1:2

In the first compound, 12 g of B combines with 10 g of A, while in the second, 36 g of B combines with the same 10 g of A. Thus, the ratio of the masses of B is 12:36. Dividing both terms by 12 gives 1:3. Therefore, among the given options, 1:3 should be option B; the original answer label is inconsistent. Exam tip: in multiple-proportion questions, when the mass of one element is fixed, reduce the masses of the other element to the smallest whole-number ratio.

Related tags

ChemistryLaw Of Multiple ProportionsChemical CombinationMass RatioClass 11Laws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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