alleryThe primary cell that cannot be reused after its EMF drops to zero is exemplified by
ALead storage battery
BNickel-cadmium cell
CNickel-metal-hydride cell
DDry cell (Leclanché)
Answer & Solution
Correct answer: D. Dry cell (Leclanché)
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: syllabus Chemistry, Unit 3 "Electrochemistry", §3.6_
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