Chemistry Some Basic Concepts of Chemistry All Topic Question for Revision Test Single Correct MCQ
Published on: August 13, 2026

1.14 g of metal dissolved in nitric acid were precipitated as copper hydroxide by adding caustic alkali solution. The precipilated copper hydroxide after washing, drying and heating yields 1.43 g of copper oxide. Which law of chemical combination is illustrated by this statement?

A
Avogadro's law
B
Law of reciprocal proportions
C
Law of multiple proportions
D
Law of definite proportions

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The correct answer is:
D

The copper oxide yield has a definite proportion. Hence, the above data illustrate the law of definite proportion.

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