Aluminium is used for making alloys because of its

Options

A. Resistance to corrosion
B. Poor conductivity
C. Heaviness
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Properties of Aluminium:**
- Aluminium is known for several key properties that make it suitable for making alloys. These properties include ductility, malleability, lightweight, good electrical conductivity, and resistance to corrosion.

2. **Analyzing the Options:**
- The question provides four options regarding why aluminium is used for making alloys:
- A) Resistance to corrosion
- B) Poor conductivity
- C) Heaviness
- D) All of these

3. **Evaluating Each Option:**
- **Option A: Resistance to Corrosion**
- Aluminium is indeed resistant to corrosion as it forms a protective layer of aluminium oxide when exposed to air, which prevents further oxidation.
- **Option B: Poor Conductivity**
- This option is incorrect. Aluminium is a good conductor of electricity, not a poor conductor.
- **Option C: Heaviness**
- This option is also incorrect. Aluminium is a lightweight metal, significantly lighter than steel.
- **Option D: All of these**
- Since options B and C are incorrect, this option cannot be true.

4. **Conclusion:**
- The correct answer is **Option A: Resistance to corrosion**. This property is one of the main reasons aluminium is used for making alloys, particularly in applications like aircraft bodies where durability and lightweight materials are essential.