InterviewSolution
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InterviewSolution
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A lead storage battery consists of a lead anode and a grid of lead packed with lead dioxide as the cathode. The electrolyte taken is 39% `H_(2)SO_(4)` by mass having a density of 1.294 g `mL^(-1)`. The battery holds 3.5 L of the acid. During the discharge of the battery, the density `H_(2)SO_(4)` falls from 1.294 g `mL^(-1)` to 1.139 g `mL^(-1)` which is 20% `H_(2)SO_(4)` by mass Q. The reacton occurring at the andoe during charging isA. `Pb^(2+)+2e^(-)toPb`B. `Pb^(2+)+SO_(4)^(2-)toPbSO_(4)`C. `PbtoPb^(2+)+2e^(-)`D. `PbSO_(4)+2H_(2)Oto2PbO_(2)+4H^(+)+SO_(4)^(2-)+2e^(-)` |
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Answer» Correct Answer - D At anode, oxidation occurs. `PbSO_(4)` is oxidized to `PbO_(2)` according tor eaction (d). |
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