Which of the following forms of iron has highest melting point ?

Options

A. Pig iron
B. Cast iron
C. Steel
D. Wrought iron

Answer

To determine which form of iron has the highest melting point, we can analyze the different forms of iron and their properties. Here’s a step-by-step solution:

### Step 1: Identify the Forms of Iron
The common forms of iron include:
- Pig Iron
- Cast Iron
- Steel
- Wrought Iron

### Step 2: Research Melting Points
Next, we need to look up the melting points of each of these forms:
- **Pig Iron**: Melting point around 1200-1300°C
- **Cast Iron**: Melting point around 1150-1300°C
- **Steel**: Melting point varies, generally around 1425-1540°C depending on the alloy composition
- **Wrought Iron**: Melting point around 1500°C

### Step 3: Compare Melting Points
Now, we compare the melting points:
- Pig Iron: ~1200-1300°C
- Cast Iron: ~1150-1300°C
- Steel: ~1425-1540°C
- Wrought Iron: ~1500°C

### Step 4: Identify the Highest Melting Point
From the comparison, we can see that:
- Wrought Iron has the highest melting point at approximately 1500°C.

### Conclusion
Thus, the form of iron with the highest melting point is **Wrought Iron**.

### Final Answer
The correct answer is **Wrought Iron**.

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