NEET ChemistryClass 12BatteriesEasyStatement based

A car battery and a watch battery work on different chemistry. Which of the statements below are correct?

Statement I: When a lead storage battery discharges, PbSO₄ forms at both electrodes.
Statement II: In a lead storage battery the anode is lead and the cathode is a lead grid packed with PbO₂.
Statement III: The concentration of sulphuric acid in a lead storage battery rises during discharge.
Statement IV: A mercury cell gives a nearly constant potential of about 1.35 V over its life.

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A car battery and a watch battery work on different chemistry. Which of the statements below are correct?

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