Which of the following metals is commonly used to coat cheaper metals in electroplating for ornaments?
Show answer & explanation
Correct answer: D
Explanation
Correct Answer:
Option 4: Silver or Gold
Explanation:
Electroplating is a process in which a thin layer of a precious metal (such as gold or silver) is deposited onto an inexpensive metal. This technique is utilized in jewelry making to create expensive-looking and attractive ornaments at a lower cost. In this process, metal ions are deposited onto a surface through the application of an electric current. Typically, copper or iron serves as the base metal, upon which gold or silver is plated. This not only enhances the aesthetic appeal but also protects the metal from corrosion.
Additional Facts:
Option 1: Aluminum is generally not used for plating purposes.
Option 2: Iron can serve as a base metal, but not as the plating metal.
Option 3: Copper is used as a base metal.
Potential Questions for Upcoming Exams:
Question: What is electroplating?
Answer: The process of depositing a layer of metal.
Question: What is used in electroplating?
Answer: Electric current.
Question: Which process is used to protect against rust/corrosion?
Answer: Galvanization.
Question: Which metal's layer is deposited during galvanization?
Answer: Zinc.