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Per NCERT, who is credited with the LAW OF CONSTANT PROPORTIONS (or Definite Proportions)?
AJohn Dalton
BMarie Curie
CJoseph Proust
DAntoine Lavoisier
Answer & Solution
Correct answer: C. Joseph Proust
Per NCERT §9.2 Meet a Scientist box, Proust proposed the law of constant proportions. Lavoisier did conservation; Dalton atomic theory; Curie radioactivity.
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