Question : Which of the following acids is used in lead storage batteries?
Option 1: Acetic acid
Option 2: Hydrochloric acid
Option 3: Sulphuric acid
Option 4: Nitric acid
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Correct Answer: Sulphuric acid
Solution : The correct option is Sulphuric acid.
Lead-acid batteries contain sulphuric acid. It is essential for the chemical processes within the battery, promoting electron movement and allowing energy storage and discharge. A lead-acid battery's basic design includes lead dioxide (PbO 2 ) as the positive electrode, porous lead (Pb) as the negative electrode and a diluted sulphuric acid (H 2 SO 4 ) solution as the electrolyte.
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