A lead storage battery is discharged. During the charging of this battery, the reaction that occurs at anode is

Options

A. `PbSO_(4)(s)+2e^(-)rarrPb(s)+SO_(4)^(2-)(aq)`
B. `PbSO_(4)(s)+2H_(2)O(/)rarrPbO_(2)+SO_(4)^(2-)(aq)+4H^(+)(aq)+2e^(-)`
C. `PbSO_(4)(s)rarrPb^(2^(+))(aq)+SO_(4)^(2-)(aq)`
D. `PbSO_(4)(s)+2H_(2)O(/)+2e^(-)rarrPbO_(2)(s)+SO_(4)^(2-)(aq)+2H^(+)(aq)`

Explanation

During recharging, the cell is operated like an electrolytic cell. The electronde reactions are the reverse of these occur during discharge.
At cathod
`PbSO_(4)(s)+2e^(-)rarrPb(s)+SO_(4)^(2-)(aq)`
At anode `PbSO_(4)(s)+2H_(2)O(l)rarrPbO_(2)(s)+SO_(4)^(2-)+4H^(+)(aq)+2e^(-)`
Net reaction
`2PbSO_(4)(s)+2H_(2)O(l)rarrPb(s)+PbO_(2)+4H^(+)(aq)+2SO_(4)^(2-)(aq)`