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In two compounds fixed 7 grams of A combines with 10 grams and 25 grams of B. What is the simple ratio of B masses?

Answer and explanation

Correct answer: 2:5

The masses of B are 10 g and 25 g. Dividing both by their greatest common divisor, 5, gives \(10:25 = 2:5\). Therefore, option C is correct. Option A, \(5:2\), is the reverse of the required ratio. Exam tip: always reduce a ratio to its simplest whole-number form.

Related tags

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

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