Generally, a metal gets corroded due to oxidation. Name a metal which becomes chemically resistant due to oxidation.

Options

A. zinc
B. copper
C. aluminium
D. iron

Explanation

**Step-by-Step Solution:**

1. **Understanding Corrosion**: Corrosion is a process where metals react with oxygen and moisture in the environment, leading to deterioration. This is commonly seen in metals like iron, which rusts when exposed to oxygen and water.

2. **Identifying a Metal Resistant to Corrosion**: We need to find a metal that becomes chemically resistant due to oxidation. This means that when this metal reacts with oxygen, it forms a protective layer that prevents further corrosion.

3. **Considering Common Metals**: Common metals include iron, zinc, copper, and aluminum. Among these, we need to identify which one forms a protective oxide layer.

4. **Analyzing Aluminum**: Aluminum is known to react with oxygen to form aluminum oxide (Al2O3). This aluminum oxide layer is very stable and adheres strongly to the surface of the aluminum, preventing further oxidation and corrosion.

5. **Writing the Reaction**: The chemical reaction when aluminum reacts with oxygen can be written as:
\[ 4Al + 3O_2 \rightarrow 2Al_2O_3 \]
This shows that aluminum reacts with oxygen to form aluminum oxide.

6. **Conclusion**: Since aluminum forms a protective oxide layer (Al2O3) that resists further corrosion, it is the metal we are looking for. Therefore, the answer to the question is aluminum.

**Final Answer**: Aluminum

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