Question

Which of the following acids is used in car batteries?
(A) Nitric acid
(B) Hydrochloric acid
(C) Sulphuric acid
(D) Carbonic acid

Answer 1

Hint: You should know that it is a colorless, odorless, and syrupy liquid that is soluble in water and is synthesized in reactions that are highly exothermic. It is also known as “king of acids”.

Complete step by step answer:
> You should know that batteries are made with electrolytes which can be acidic or basic. As we know the most well known acid-based battery is the lead acid battery.
> First let us know about lead-acid battery,
Generally, a typical lead acid battery contains varying concentrations of water acid. Aswe know sulphuric acid has a higher density than water, which causes the acid formed at the plates during the charging and discharging to flow downward and collect at the bottom of the battery.
> An easy way to explain this process is, beforehand sulphuric acid and water mixture is used, as we know the battery plates are made of lead, which has very loosely bound atoms.
The electrolyte i.e. sulphuric acid and water. Releases the atoms electrons from their orbits. Now, when a circuit is made you will see the electron flow or current. We can now charge a battery to replace these electrons.
Hence, sulphuric acid is used in car batteries. Therefore, option C is the required answer.

Note: When a lead acid battery is fully charged, the electrolyte is composed of a solution that consists of up to 40% sulfuric acid and 60% consisting of regular water.