On charging the lead storage battery,the oxid | vedclass

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(B) During the charging of a lead storage battery,the reverse reaction occurs: $2 PbSO_{4(s)} + 2 H_2 O_{(l)} \rightarrow Pb_{(s)} + PbO_{2(s)} + 2 H_

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$+2, 0, +2, +4$

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(B) During the charging of a lead storage battery,the reverse reaction occurs: $2 PbSO_{4(s)} + 2 H_2 O_{(l)} \rightarrow Pb_{(s)} + PbO_{2(s)} + 2 H_2 SO_{4(aq)}$.At the anode,$PbSO_4$ is reduced to $Pb$. The oxidation state of $Pb$ changes from $+2$ $(x_1)$ to $0$ $(y_1)$.At the cathode,$PbSO_4$ is oxidized to $PbO_2$. The oxidation state of $Pb$ changes from $+2$ $(x_2)$ to $+4$ $(y_2)$.Therefore,the values are $x_1 = +2, y_1 = 0, x_2 = +2, y_2 = +4$.

On charging the lead storage battery,the oxidation state of lead changes from $x_1$ to $y_1$ at the anode and from $x_2$ to $y_2$ at the cathode. The values of $x_1, y_1, x_2, y_2$ are respectively $:$

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