Duralumin is a mixture of

Options

A. copper and zinc
B. copper and tin
C. copper, nickel and zinc
D. aluminium copper and traces of Mg and Mn.

Explanation

**Step-by-Step Solution:**

1. **Understanding Duralumin**: Duralumin is an alloy, which is a mixture of two or more metals combined in a fixed proportion.

2. **Composition of Duralumin**: The specific composition of Duralumin is approximately 95% Aluminium, 3% Copper, 1% Manganese, and 0.5% Magnesium.

3. **Analyzing the Options**: We need to analyze the provided options to determine which one correctly describes the composition of Duralumin:
- **Option A**: Copper and Zinc - This is incorrect as Zinc is not part of Duralumin.
- **Option B**: Copper and Tin - This is incorrect as Tin is also not part of Duralumin.
- **Option C**: Copper, Nickel, and Zinc - This is incorrect as neither Nickel nor Zinc is part of Duralumin.
- **Option D**: Aluminium, Copper, Traces of Magnesium, and Manganese - This is correct as it includes Aluminium, Copper, and the trace amounts of Magnesium and Manganese.

4. **Conclusion**: Therefore, the correct answer is **Option D**, which states that Duralumin is a mixture of Aluminium, Copper, traces of Magnesium, and Manganese.

---