1.

Which among the following equations represents the reduction reaction reaction taking place in lead accumulator at positive electrode, while it is being used as a source of electrical energy ?

Answer»

`PB to Pb^(2+)`
`Pb^(4+) to Pb`
`Pb^(2+) to Pb`
`Pb^(4+) to Pb^(2+)`

SOLUTION :Reaction at positive ELECTRODE is ,
`PbO_(2(s))+4H_((AQ))^(+)+SO_(4(aq))^(2-)+2e^(-) to PbSO_(4(s))+2H_(2)O_((l))`
`therefore Pb^(4+)` is converted into `Pb^(2+)`


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