MCQ
The active materials used in lead$-$acid battery are:
- ✓Spongy lead and lead oxide $\left(\mathrm{PbO}_2\right)$
- B$\mathrm{PbO}_2$ and $\mathrm{Pb}_2 \mathrm{O}_3$
- CSpongy lead and $\mathrm{Pb}_2 \mathrm{O}_3$
- DOnly $\mathrm{PbO}_2$
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Product $(B)$ is
