Why lead storage can be recharged ?

Explanation

### Step-by-Step Solution

1. **Understanding Lead Storage Batteries**: Lead storage batteries, commonly known as lead-acid batteries, consist of lead dioxide (PbO2) as the positive electrode, sponge lead (Pb) as the negative electrode, and sulfuric acid (H2SO4) as the electrolyte.

2. **Chemical Reactions During Discharge**: When the battery discharges, the following reactions occur:
- At the positive electrode:
\[
\text{PbO}_2 + 3\text{H}_2\text{SO}_4 + 2\text{e}^- \rightarrow \text{PbSO}_4 + 3\text{H}_2\text{O}
...