Which of the following reactions occur at the cathode during the charging of lead storage battery ?

Options

A. `Pb^(2+) + 2e^(-) rarr Pb`
B. `Pb^(2+) + SO_(4)^(2-) rarr PbSO_(4)`
C. `Pb rarr Pb^(2+) + 2e^(-)`
D. `PbSO_(4) + 2H_(2)O rarr PbO_(2) + 4H^(+) + SO_(4)^(2-) + 2e^(-)`

Answer

D