Which statement correctly explains the law of conservation of mass?
Answer and explanation
Correct answer: Total mass remains the same in a chemical reaction
The law of conservation of mass states that matter is neither created nor destroyed in a chemical reaction. Atoms are rearranged into new substances, so the total mass of the reactants equals the total mass of the products in a closed system. This is why chemical equations are balanced. Options B, C and D contradict the law by claiming that mass disappears, products have no mass, or reactant mass is always doubled.
Frequently asked questions
What is the correct answer to this question?
Total mass remains the same in a chemical reaction
Why is this the correct answer?
The law of conservation of mass states that matter is neither created nor destroyed in a chemical reaction. Atoms are rearranged into new substances, so the total mass of the reactants equals the total mass of the products in a closed system. This is why chemical equations are balanced. Options B, C and D contradict the law by claiming that mass disappears, products have no mass, or reactant mass is always doubled.
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.
