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When a lead storage battery is discharged, then

(a) SO2 is evolved

(b) lead is formed

(c) lead sulphate is formed

(d) sulphuric acid is consumed

1 Answer

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(d) sulphuric acid is consumed

Discharging the stored energy relies on both the positive and negative plates becoming lead (II) sulphate and the electrolyte losing much of its dissolved sulphuric acid. 

Hence, sulphuric acid is consumed.

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