(i) PbSO4 anode is reduced to Pb
(ii) PbSO4 cathode is reduced to Pb
(iii) PbSO4 cathode is oxidised to Pb
(iv) PbSO4 anode is oxidised to PbO2
Correct Answer: (i) PbSO4 anode is reduced to Pb
Explanation: While charging the battery storage lead the cell-based reaction which is reversed and the PbSO4 (s) at the anode and cathode are converted to Pb and PbO2 respectively.