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Question

Who proposed the law of constant proportions?

A
John Dalton
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B
Joseph Proust
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C
Antoine Lavoisier
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D
Ernest Rutherford
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Solution

The correct option is B Joseph Proust
The French scientist J. L. Proust proposed the law of constant proportions. It state that: a chemical compound always contains the same elements combined together in the same proportion by mass.

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