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Asked: 2025-01-31T10:47:21+00:00 In:

The law of constant proportion states :

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0% (a) Matter can neither be created nor destroyed.
100% (b) Elements are always present in a fixed proportion by mass in a chemical compound. ( 1 voter )
0% (c) Volume of a gas varies inversely as its pressure at constant temperature.
0%(d) None of the above.
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The correct answer is (b) Elements are always present in a fixed proportion by mass in a chemical compound. The Law of Constant Proportion, proposed by Joseph Proust, states that a chemical compound always contains the same elements in the same fixed ratio by mass, regardless of its source or method of preparation.
Class 9th Science NCERT MCQ Questions
NCERT Books MCQ Questions Session 2024-2025.

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    1 Answer

    1. (b) This is the correct statement of law of constant proportion.

      https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/

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