Question

Which theory has provided an explanation for the law of conservation of mass and the law of definite proportions?

• A. Dalton's atomic theory
• B. Lavoisier's theory
• C. J.J Thomson's atomic theory
• D. Democritus atomic theory

Answer 1

The correct option is A

Dalton's atomic theory

Daltons' atomic theory was based on the laws of chemical combinations i.e., law of conservation of mass and the law of definite proportions. The two postulates which supports the law of combinations are:

• Atoms combine in the ratio of small whole numbers to form compounds.
• Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction