Iron loses magnetic property at

Options

A. Melting point
B. 1000 K
C. Curie point
D. Boiling point

Explanation

To determine at what temperature iron loses its magnetic property, we need to understand the concept of Curie temperature.

### Step-by-Step Solution:

1. **Understanding Magnetic Properties**: Iron is a ferromagnetic material, meaning it has a strong magnetic property at room temperature. However, this property can change with temperature.

2. **Curie Temperature**: The temperature at which a ferromagnetic material loses its magnetic properties is known as the Curie temperature (or Curie point). Above this temperature, the material becomes paramagnetic, meaning it can no longer maintain a permanent magnetic moment.

3. **Curie Temperature for Iron**: For iron (Fe), the Curie temperature is approximately 1000 K. This means that when iron is heated to this temperature, it will lose its ferromagnetic properties and will no longer be magnetically ordered.

4. **Conclusion**: Therefore, iron loses its magnetic property at the Curie temperature, which is 1000 K.

### Final Answer:
Iron loses its magnetic property at the Curie temperature of 1000 K.

---