alleryThe electrolyte in a lead storage battery (lead-acid) is approximately:
A38% H₂SO₄ solution
BKOH paste
CConcentrated HNO₃
D5% NaCl
Answer & Solution
Correct answer: A. 38% H₂SO₄ solution
**Lead-acid cell:** Pb anode, PbO₂ cathode, **~38% H₂SO₄ as electrolyte**.
**Discharge:** Pb + PbO₂ + 2H₂SO₄ → 2PbSO₄ + 2H₂O.
On charging the reaction is reversed.
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