NCERT · Class 9 · Science · Atoms and MoleculesWho stated the Law of Constant Proportions?
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Step-by-Step Solution
Joseph Proust stated the Law of Constant Proportions, which states that in a chemical substance the elements are always present in definite proportions by mass.
Detailed Options Breakdown
Option : Antoine Lavoisier
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Atoms and Molecules.
Option 1: Joseph Proust (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: John Dalton
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Atoms and Molecules.
Option 3: Robert Boyle
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Atoms and Molecules.
💡 Study Guide: This question tests core syllabus concepts from Atoms and Molecules. For formulas, key summaries, and mock exam reference guides, read the full Atoms and Molecules Revision Notes.