Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound…

Strategy: Identify compound A from its properties: strong oxidising agent, amphoteric, and component of lead-acid batteries.

Step 1: Lead Battery Chemistry In a lead-acid (lead storage) battery:

• Anode: $\ce{Pb}$
• Cathode: $\ce{PbO2}$ (lead dioxide)
• Electrolyte: $\ce{H2SO4}$

The cathode material $\ce{PbO2}$ is the compound used in the battery. ✅

Step 2: Properties Verification

• Strong oxidising agent: $\ce{PbO2}$ contains Pb(IV), a high oxidation state that readily gains electrons (e.g., oxidises $\ce{HCl}$ to $\ce{Cl2}$). ✅
• Amphoteric: $\ce{PbO2}$ reacts with acids (giving Pb⁴⁺ salts) and strong bases (giving plumbate $\ce{PbO3^{2-}}$). ✅
• Part of lead storage battery: Cathode material. ✅

$\boxed{\text{Answer: (C) }\ce{PbO2}}$