Question

Assertion (A): During a chemical reaction, the total mass of the reactants is equal to the total mass of the products.
Reason (R): During a reaction, the formation and destruction of atoms take place.

• A. Both A and R are false
• B. Both A and R are true but R is not the correct explanation of A
• C. Both A and R are true and R is the correct explanation of A
• D. A is true but R is false

Answer 1

The correct option is D A is true but R is false

According to the law of conservation of mass, mass can neither be created nor be destroyed in a chemical reaction.
It means that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This is because during a chemical reaction, only the rearrangement of atoms takes place keeping the total mass of the reactants equal to the total mass of the products.

Thus, A is true but R is false.