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?

More NEET Chemistry chapters

Practising is step one. Knowing what to practise next is the hard part.

Practising is step one. Knowing what to practise next is the hard part