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In different samples of pure AlCl₃, the percentage of elements remains the same. Which law is this?

Answer and explanation

Correct answer: Law of definite proportions

The key concept is the law of definite proportions, which states that a pure compound always contains the same constituent elements in a fixed ratio by mass. Since all the samples named here are pure AlCl₃, each contains aluminium and chlorine in the same mass percentages, even if the samples differ in size or origin. The law of conservation of mass describes the total mass balance during a reaction, not the composition of a compound. The law of multiple proportions requires comparison of different compounds made from the same elements. The law of gaseous volumes deals with volume relationships among reacting gases. Thus the wording about different samples of one pure compound leads directly to option B.

Related tags

ChemistryLaw-Of-Definite-ProportionsCompositionLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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