Mercury containers are made of

Options

A. Ag
B. Pb
C. Al
D. Fe

Answer

To answer the question "Mercury containers are made of," we will analyze the properties of mercury and the materials that can safely contain it.

### Step-by-Step Solution:

1. **Understanding Mercury**:
- Mercury (Hg) is a heavy, silvery metal that is liquid at room temperature. It is known for its toxicity and the harmful effects of inhaling its vapors.

2. **Properties of Mercury**:
- Mercury can react with many metals to form amalgams, which are alloys of mercury with other metals. This means that when mercury comes into contact with certain metals, it can combine with them, potentially compromising the integrity of the container.

3. **Identifying Suitable Materials**:
- The question provides four options for materials that could be used to make containers for mercury:
- Option 1: Silver (Ag)
- Option 2: Lead (Pb)
- Option 3: Aluminum (Al)
- Option 4: Iron (Fe)

4. **Analyzing Each Option**:
- **Silver (Ag)**: Reacts with mercury to form amalgam.
- **Lead (Pb)**: Also reacts with mercury to form amalgam.
- **Aluminum (Al)**: Reacts with mercury and forms amalgam.
- **Iron (Fe)**: Does not react with mercury to form amalgam, making it a suitable choice for containers.

5. **Conclusion**:
- Since iron does not amalgamate with mercury, it is the most appropriate material for making containers to hold mercury. Therefore, the correct answer is **Option 4: Iron (Fe)**.

### Final Answer:
Mercury containers are made of **Iron (Fe)**.

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