Mercury is transported in the containers made of :

Options

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

Answer

To solve the question of what material is used to transport mercury, we can follow these steps:

### Step 1: Understand the properties of mercury
Mercury (Hg) is a unique metal that is liquid at room temperature. It is important to note that mercury can react with certain metals, forming amalgams, which are alloys of mercury with other metals.

**Hint:** Consider the physical state of mercury and its reactivity with other metals.

### Step 2: Analyze the options given
The options provided are:
- A) Silver
- B) Lead
- C) Aluminum
- D) Iron

We need to evaluate each option to see if it can safely contain mercury without forming an amalgam.

**Hint:** Think about the chemical behavior of mercury with each of the metals listed.

### Step 3: Evaluate each material
- **Silver:** Mercury can form an amalgam with silver, which would not be suitable for transportation.
- **Lead:** Mercury can also amalgamate with lead, making it an unsuitable choice.
- **Aluminum:** Mercury reacts with aluminum, leading to the formation of an amalgam, thus not a safe option.
- **Iron:** Iron does not form an amalgam with mercury, making it a safe choice for transporting mercury.

**Hint:** Identify which materials can safely contain mercury without reacting with it.

### Step 4: Conclusion
Based on the evaluation, the only metal that does not react with mercury to form an amalgam is iron. Therefore, the correct answer is:

**Mercury is transported in containers made of Iron.**

### Final Answer:
**Option D: Iron**

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