When a lead storage battery is charge:

P b O_{2}

dissolves

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the lead electrode becomes coated with lead sulphate

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sulphuric acid is regenerated

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the amount of acid decreases

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Solution

The correct option is C sulphuric acid is regenerated
Lead Storage Battery:-
$\to$ Lead Storage cell is a secondary voltaic cell.
$\to$ During the recharging process, original reactants are regenerated. Hence, electrical energy is stored.
$\to$ Electrolyte used in lead storage cell is $H_{2} S O_{4}$ . During discharge $H_{2} S O_{4}$ is consumed., and during recharging concentration of $H_{2} S O_{4}$ increases as it is generated.

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When lead storage battery is charged:

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