Iron is coated with _________to make automobiles and bridges.

Options

A. Nickel
B. Aluminum
C. Zinc
D. Chromium

Answer

To answer the question "Iron is coated with _________ to make automobiles and bridges," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Purpose of Coating Iron**:
- Iron is used in construction, particularly for automobiles and bridges. However, iron is prone to rusting and corrosion when exposed to moisture and air.

2. **Identify the Coating Process**:
- The process used to protect iron from rusting is called galvanization. This involves applying a protective layer to the iron.

3. **Determine the Material Used for Coating**:
- The most common material used for galvanization is zinc. Zinc acts as a barrier to moisture and air, which helps prevent rusting.

4. **Conclude the Answer**:
- Therefore, iron is coated with **zinc** to make automobiles and bridges.

### Final Answer:
Iron is coated with **zinc** to make automobiles and bridges.

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