Iron is galvanised when it is dipped in

Options

A. molten zinc
B. molten copper
C. molten carbon
D. molten gold.

Explanation

To answer the question "Iron is galvanised when it is dipped in", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Galvanization**:
- Galvanization is a process used to protect iron and steel from rusting. It involves coating the metal with a layer of zinc.

2. **Corrosion of Iron**:
- When iron is exposed to moisture and oxygen in the atmosphere, it undergoes corrosion, leading to the formation of rust (hydrated ferric oxide). This rust weakens the iron and affects its appearance.

3. **Purpose of Galvanization**:
- The main purpose of galvanization is to prevent corrosion. By coating iron with zinc, the iron is protected from direct exposure to moisture and oxygen.

4. **The Process of Galvanization**:
- The process typically involves dipping the iron into molten zinc. This creates a protective layer of zinc on the surface of the iron.

5. **Conclusion**:
- Therefore, iron is galvanised when it is dipped in molten zinc.

### Final Answer:
Iron is galvanised when it is dipped in **molten zinc**.

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