Question

10.0 gm \( \text{CaCO}_3 \) on heating gave 5.6 gm of \( \text{CaO} \) and 4.4 gm of \( \text{CO}_2 \), given data support the law of:

• A. Multiple proportion
• B. Constant proportion
• C. Law of conservation of mass
• D. All of these

Hint:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction, so the total mass of reactants equals the total mass of products.

Answer 1

The Correct Option is D

This reaction follows the law of conservation of mass, as the mass of reactants (10.0 gm of \( \text{CaCO}_3 \)) is equal to the mass of products (5.6 gm of \( \text{CaO} \) and 4.4 gm of \( \text{CO}_2 \)). This also supports the law of constant proportion, as the reaction consistently yields the same products when \( \text{CaCO}_3 \) is heated. Thus, all of these laws are applicable.