Electrolysis Practice Exam

Which of the following effectively describes 'dispersive electrodes' in electrolysis?

1. Electrodes that concentrate current

2. Electrodes that are insulated

3. Electrodes that distribute current evenly

4. Electrodes powered by alternative sources

The correct answer is: Electrodes that distribute current evenly

Dispersive electrodes are designed to distribute electric current evenly throughout the electrolyte. This uniform distribution is crucial in electrolysis processes because it ensures that the electrochemical reactions occur consistently across the entire electrode surface. By providing an even flow of current, dispersive electrodes help prevent localized heating and unwanted side reactions that can occur when current is concentrated in one area. This characteristic contributes to improved efficiency and effectiveness of the electrolysis process. The other options describe different aspects that do not align with the function of dispersive electrodes. For instance, electrodes that concentrate current would lead to uneven reactions and potential issues such as electrode deterioration. Insulated electrodes would not conduct current at all, making them ineffective in electrolysis. Finally, electrodes powered by alternative sources do not specifically pertain to the function of dispersive electrodes, which focus on current distribution rather than the power source.