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The law of definite proportions was first stated by the chemist:
ABohrs
BCurie
CProust
DDalton
Answer & Solution
Correct answer: C. Proust
1. This law says elements are present in definite proportions by mass.
2. One chemist put it into words.
3. That chemist was Proust.
_Source: syllabus Science Class IX, Chapter 3, Atoms and Molecules._
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