Galvanisation is a method of protecting iron from rusting by coating it with a thin layer of 

Options

A. Gallimn
B. aluminium
C. zinc
D. silver

Explanation

**Step-by-Step Solution:**

1. **Understanding Galvanization**: Galvanization is a method used to protect iron from rusting. Rusting occurs when iron reacts with moisture and oxygen in the environment, leading to the formation of iron oxide, commonly known as rust.

2. **Coating Material**: The process of galvanization involves coating the iron with a protective layer. The material used for this coating is crucial for preventing rust.

3. **Identifying the Coating**: The coating used in galvanization is a thin layer of a specific metal. In this case, the metal used is zinc.

4. **Mechanism of Protection**: When iron is coated with zinc, it prevents the oxidation of iron. Zinc acts as a sacrificial anode; it oxidizes in preference to iron, thereby protecting the iron from rusting. This means that even if the zinc layer is scratched, the exposed iron will not rust as long as there is zinc present.

5. **Conclusion**: Therefore, galvanization is a method of protecting iron from rusting by coating it with a thin layer of zinc.

**Final Answer**: Galvanisation is a method of protecting iron from rusting by coating it with a thin layer of **zinc**.

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