The acid used in a car battery is:
- AAcetic acid
- BHydrochloric acid
- CNitric acid
- DSulfuric acid
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (d) Sulfuric acid
Explanation
The lead–acid battery used in cars works with dilute sulphuric acid (H₂SO₄), about 35% by mass, between plates of lead dioxide and spongy lead.
As the battery discharges, the acid is used up in forming lead sulphate and becomes weaker, so the acid's density shows the state of charge.