Science
Law of constant proportions
In this Class 9 Science topic from “Atomic Foundations of Matter,” students learn that a pure compound always contains the same elements combined in a fixed ratio by mass, regardless of its source or method of preparation. The topic connects this idea with atoms, elements, compounds, and chemical composition. Examples such as water help students understand how the masses of hydrogen and oxygen remain constant in a compound and how this principle supports the study of matter.
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Practice questions are not available for this topic yet. We plan to add questions with clear explanations soon. You can keep practising other topics in the meantime.
- Class / subject
- 9 · Science
- Chapter
- Atomic Foundations of Matter
- Topic
- Law of constant proportions
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