alleryStart learning →In a galvanic cell, electron transfer between the reactants happens:
AThrough the atmosphere
BThrough an external circuit
CBy direct contact only
DAcross a vacuum gap
Answer & Solution
Correct answer: B. Through an external circuit
1. The two reactants are deliberately kept apart in separate half-cells.
2. Direct transfer of electrons is therefore prevented.
3. Transfer instead takes place indirectly through an external circuit that contacts the separated reactants.
4. Routing the electrons through a wire is what lets the cell do useful electrical work.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 17 'Electrochemistry', sections 17.1-17.7_
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