Electrolysis Practice Exam

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How many dissimilar metal plates are in a typical Voltaic cell?

  1. 1

  2. 2

  3. 3

  4. 4

The correct answer is: 2

In a typical Voltaic cell, there are two dissimilar metal plates, each serving as an electrode. These electrodes are essential for the electrochemical reactions that generate electrical energy. The differing materials of the electrodes allow for a redox reaction to occur. One electrode acts as the anode, where oxidation takes place, and the other acts as the cathode, where reduction occurs. This difference in reactivity between the metals is essential because it creates a potential difference, enabling the flow of electrons from the anode to the cathode through an external circuit. This fundamental principle is what powers the cell and produces electricity.

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