Home Chemistry Some Basic Concepts of Chemistry Skill Builder Select the incorrect statement regarding law…
Chemistry Some Basic Concepts of Chemistry Skill Builder Single Correct MCQ
Published on: August 11, 2026

Select the incorrect statement regarding laws of chemical combination :

A
According to law of conservation of mass, matter can neither be created nor be destroyed
B
According to law of definite proportions, a given compound always contains exactly the same proportion of elements by weight.
C
According to law of multiple proportions, if two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers.
D
According to Gay Lussac's law, equal volumes of all gases at the same temperature and pressure should contain equal number of molecules

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The correct answer is:
D

According to Avogadro's law, equal volumes of all gases at the same temperature and pressure should contain equal number of molecules.

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