The primary cell that cannot be reused after its EMF drops to zero is …

Question

The primary cell that cannot be reused after its EMF drops to zero is exemplified by

Accepted Answer

D. {'text': 'Dry cell (Leclanché)', 'label': 'D'}

1. Primary cells generate electricity from irreversible reactions.
2. They cannot be recharged and are discarded when spent.
3. Dry cell (Leclanché) is a common primary cell.
4. Lead storage, nickel-cadmium and NiMH are secondary (rechargeable) cells.
_Source: NCERT Class 12 Chemistry, Unit 3 "Electrochemistry", §3.6_

Answer

{'text': 'Lead storage battery', 'label': 'A'}

Answer

{'text': 'Nickel-cadmium cell', 'label': 'B'}

Answer

{'text': 'Nickel-metal-hydride cell', 'label': 'C'}