In electrochemical cells, reduction takes place at:
Correct answer: B. Cathode
- A. Anode
- B. Cathode
- C. At the surface of the electrolyte
- D. None of these
Explanation
In electrochemical cells, reduction occurs at the cathode, which is the electrode where electrons are gained by the chemical species. This is distinct from the anode, where oxidation (loss of electrons) takes place. The cathode is crucial in the process as it facilitates the reduction half-reaction, completing the circuit and allowing the cell to function. Option B is correct because it identifies the cathode as the site of reduction. Options A, C, and D are incorrect because they misidentify the location or deny the occurrence of reduction in the cell.
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Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
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