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In which reactants are not contained within the cell but are continuously supplied from external source?

1. Fuel cell
2. Dry cell
3. Lithium battery
4. Lead storage battery

Correct answer: Fuel cell

Solution

A fuel cell generates electricity by continuously converting externally supplied reactants, so the reactants are not stored inside the cell. Dry cells, lithium batteries, and lead storage batteries all contain their reactants within the cell structure.

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