What is the process of covering iron with zinc to prevent rusting called?

Solution:

The process of covering iron with zinc to prevent rusting is called galvanization. This method protects the iron from corrosion by forming a protective layer of zinc.

1. a. Electroplating: This is a process of depositing a thin layer of metal onto another metal using an electric current. While it can prevent rusting, it's not specifically the process of covering with zinc for this purpose.
2. b. Galvanization: This is the process of applying a protective zinc coating to steel or iron, to prevent rusting. This is the correct answer.
3. c. Anodizing: This is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. It is typically used for aluminum and titanium, not iron with zinc.
4. d. Smelting: This is a process of applying heat to ore in order to melt or liquefy it, and by so doing it separate the valuable metal from the waste rock. It is not related to coating iron with zinc for rust prevention.

Answer: b. Galvanization