Multiple choice

Given compound always contains exactly the same proportion of elements by weight. This is

  1. law of multiple proportions

  2. law of conservation of mass

  3. avogadro law

  4. law of definite proportions
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D Correct answer
Explanation

This law was given by, a French chemist, Joseph Proust. He stated that a given compound always contains exactly the same proportion of elements by weight. Proust worked with two samples of cupric carbonate — one of which was of natural origin and the other was synthetic one. He found that the composition of elements present in it was same for both the samples

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