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Which scientist proposed the law of definite proportions?

Answer and explanation

Correct answer: Proust

The law of definite proportions states that a pure chemical compound always contains the same elements combined in the same fixed proportion by mass. For example, a pure compound does not change its composition merely because it is obtained from a different source. This law helped establish that compounds have definite and measurable composition.

Option A, Proust, is correct. Joseph Louis Proust proposed the law of definite or constant proportions. Lavoisier is strongly associated with conservation of mass, Dalton with atomic theory and multiple proportions, and Richter with reciprocal proportions. Remembering the specific law linked with each scientist prevents confusion between the major laws of chemical combination.

Related tags

ChemistryLaws-Of-Chemical-CombinationClass-11

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