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In two compounds, fixed 4 grams of A combines with 5 grams and 10 grams of B. Which law is supported?

Answer and explanation

Correct answer: Multiple proportions

This is a direct numerical test of the law of multiple proportions. The mass of A is fixed at 4 g in both compounds, so only the masses of B need to be compared. Those masses are 5 g and 10 g. Their ratio is 5:10, which simplifies to 1:2, a simple whole-number ratio. Therefore, the data support the law of multiple proportions, and option A is correct. The law of definite proportions would concern the fixed composition of one particular compound. Gay-Lussac’s law compares gaseous volumes, not these masses, and option D is not a scientific law.

Related tags

ChemistryMass RatioMultiple ProportionsLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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