Which of the following reactions occurs at the cathode during the recharging of a lead storage battery?

  • A
    $PbO_2(s) + 4H^+_{(aq)} + SO^{2-}_{4(aq)} + 2e^- \rightarrow PbSO_4(s) + 2H_2O(\ell)$
  • B
    $PbO_2(s) + 4H^+ + 2e^- \rightarrow Pb^{2+} + 2H_2O(\ell)$
  • C
    $Pb(s) + SO^{2-}_{4(aq)} \rightarrow PbSO_4(s) + 2e^-$
  • D
    $PbSO_4(s) + 2e^- \rightarrow Pb(s) + SO^{2-}_{4(aq)}$

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