When a lead storage battery is discharge...

When a lead storage battery is discharged

lead sulphate is consumed

oxygen gas is evolved.

lead sulphate is formed

lead sulphide is formed.

Verified by Experts

The correct Answer is:

`Pb_((s))+PbO_(2(s))+2H_2SO_(4(aq)) to 2PbSO_(4(s)) + 2H_2O_((l))`

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In a lead storage battery

`PbO_(2)` is reduced to `PbSO_(4)` at the cathode.

Pb is oxidised to `PbSO_4` at the anode.

Both electrodes are immersed in the same aqueous solution of `H_2 SO_4`.

All the above are true.

`SO_(2)` is evolved

Lead sulphate is consumed

lead is formed

Sulphuric acid is consumed

`PbO_(2)` dissolves

The lead electrode becomes coated with lead sulphate

Sulphuric acid is regenerated

The amount of acid decreases