Electrolysis Practice Exam

What is a common use of electrolysis in modern applications?

1. Water purification

2. Metal plating

3. Producing oxygen

4. Fluid dispensing

The correct answer is: Metal plating

Metal plating is a well-known application of electrolysis that involves the deposition of a metal layer onto a surface. This process enhances the aesthetic appeal, provides corrosion resistance, and improves the durability of the substrate material, which can be anything from jewelry to automotive parts. The electrolysis process involves using an electric current to reduce metal cations from a solution onto a conductive surface, allowing for even and controlled coating. In contrast, while water purification can involve electrolysis, it is less common when compared to the widespread industrial use of metal plating. Producing oxygen through electrolysis primarily references the splitting of water into hydrogen and oxygen gases, which is important but not as broadly applied in industry as metal plating. Fluid dispensing, while being a method of delivering liquids under control, does not relate directly to electrolysis processes and is generally associated with mechanical systems rather than electrochemical reactions. Thus, metal plating stands out as a primary and practical use of electrolysis in modern technology.