In a closed container, the total mass remains the same before and after a chemical reaction. Which law does this illustrate?
Answer and explanation
Correct answer: Law of conservation of mass
In a closed container, no matter enters or leaves. During a chemical reaction, atoms are only rearranged, so the total mass of the reactants equals the total mass of the products. This illustrates the law of conservation of mass. The law of definite proportions concerns the fixed mass ratio of elements in a compound, not the total mass before and after a reaction.
Frequently asked questions
What is the correct answer to this question?
Law of conservation of mass
Why is this the correct answer?
In a closed container, no matter enters or leaves. During a chemical reaction, atoms are only rearranged, so the total mass of the reactants equals the total mass of the products. This illustrates the law of conservation of mass. The law of definite proportions concerns the fixed mass ratio of elements in a compound, not the total mass before and after a reaction.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
