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Q.

“A given chemical substance always contains the same elements combined in a fixed proportions by weight” is called

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a

Both B & C

b

Law of constant proportions

c

Law of conservation of mass

d

Law of definite proportions

answer is D.

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Detailed Solution

In a compound, the elements are always present in definite proportion of mass irrespective of their sources. This is stated by the chemist Proust.

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