1.

Which among the following equation represents the reduction reaction taking place in lead accumulator at positive electrode, while it is beings used asa source of electrical energy?

Answer»

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

Solution :In lead accumulator reduction reaction is
`UNDERSET(O.N.=+4)underset(darr)(PbO_(2)(s)) + 4H^(+)(aq) + SO_(4)^(2-)(aq) to underset(O.N.=+2)underset(darr)(PbSO_(4)(s)) + 2H_(2)O(l)`


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