Question

Which is true about the 12-volt (V) lead storage batteries used in automobiles?

1) They are filled with hydrochloric acid.
2) They cannot be recharged.
3) They contain six 2-V cells.
4) They contain lead and copper electrodes.

Answer 1

The true statement about 12-volt lead storage batteries is that they contain six 2-V cells connected in series, making a total of 12 V. The batteries are rechargeable and use sulfuric acid as the electrolyte with lead and lead dioxide electrodes.

Step-by-step explanation:

The 12-volt lead storage batteries commonly used in automobiles are made up of six individual electrochemical cells. Each of these cells contributes 2 V, and when connected in series, they combine to provide the overall 12 V needed by the vehicle's electrical systems. The electrodes within each cell consist of a anode made of spongy lead and a cathode made of lead dioxide (PbO₂). The electrolyte between the electrodes is an aqueous solution of sulfuric acid (H₂SO₄), not hydrochloric acid. These batteries are designed to be rechargeable, allowing for repeated discharging and recharging cycles, which is essential for automotive applications.