Balancing a chemical equation — task. Chemistry CBSE Live product, Class 10 (2026-27).

Choose the best answer for the given question from the options:

Assertion (A): The balancing of a chemical equation is based on the Law of constant proportion.

Reason (R): Total mass of reactants is equal to total mass of products in a chemical reaction.

Both A and R are true, and R is the correct explanation of A
Both A and R are true, and R is not the correct explanation of A
A is true but R is false
A is false but R is true

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4. Balancing a chemical equation

Question: