Question

$10.0g$ of $CaC{O}_3$ on heating gave $4.4g$ of $C{O}_2$ and $5.6g$ of $CaO$. The observation is in agreement with the

• A. Law of constant composition
• B. Law of multiple proportion
• C. Law of reciprocal proportion
• D. Law of conservation of mass

Answer 1

The correct option is D Law of conservation of mass

The Law of conservation of mass states that matter can be changed from one form into another, mixtures can be separated or made, and pure substances can be decomposed, but the total amount of mass remains constant.

Mass of reactant = Mass of product

Mass of reactant = 10 gm

Mass of product = 4.4 + 5.6 = 10 gm

Hence, option D is correct