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Q.

Who proposed the law of constant proportions?

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a

Berzelius

b

Lavoisier

c

Dalton

d

Joseph Proust

answer is D.

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Detailed Solution

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Joseph Proust proposed the law of constant proportions. He was a French chemist, who developed the law from his work on sulfides, metallic oxides, and sulfates in the year 1794. 

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