Question

Assertion (A): Sulphuric acid is often used in car batteries.

Reason (R): It reacts with the lead plates to facilitate the flow of electrons.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If both A and R are true, and R is the correct explanation of A.

Explanation:

The assertion is true because a 30-35% dilute sulphuric acid solution serves as the vital electrolyte in lead-acid car batteries. The reason perfectly explains this because, during discharge, the acid actively undergoes a chemical redox reaction with the lead and lead dioxide plates to form lead sulphate. This movement of ions and chemical transfer of charge directly facilitates the external flow of electrons that generates electrical current.