Which metal reacts with water or steam?

Options

A. Platinum
B. Copper
C. Silver
D. Iron

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which metal reacts with water or steam. To answer this, we need to consider the reactivity of metals with water.

2. **Reactivity Series**: Metals are arranged in a reactivity series based on their ability to displace hydrogen from water or acids. Metals that are more reactive than hydrogen can react with water or steam.

3. **Identifying Metals**: The metals that typically react with water or steam include:
- Sodium
- Potassium
- Calcium
- Magnesium
- Aluminum (with steam)
- Iron (with steam)

4. **Analyzing the Options**: If we have a list of metals (let's say Iron, Copper, Silver, and Platinum), we need to check their positions in the reactivity series:
- Iron is above hydrogen in the reactivity series.
- Copper, Silver, and Platinum are below hydrogen and do not react with water or steam.

5. **Conclusion**: Since Iron is the only metal from the given options that reacts with water or steam, it is the correct answer.

### Final Answer:
The metal that reacts with water or steam is **Iron**.

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