Match List-I with List-II and select the correct answer by using the codes given below the list :
List-I (Alloy) : List-II (Constituent)
(a) Brass : (i) Cu and Sn
(b) Bronze : (ii) Al, Cu, Mg and Mn
(c) Duralumin : (iii) Al and Mg
(d) Magnellium : (iv) Cu and Zn
Code :

Question

Accepted Answer

Option 2 is the correct answer for matching List-I (Alloy) with List-II (Constituent). Let's examine why this option is correct and why the others are not.

### Explanation for Option 2:

1. **Brass (a) : Cu and Zn (iv)**
   - Brass is an alloy primarily composed of copper (Cu) and zinc (Zn). This combination gives brass its characteristic properties, such as malleability and resistance to corrosion. Therefore, the correct match for brass is Cu and Zn.

2. **Bronze (b) : Cu and Sn (i)**
   - Bronze is an alloy consisting mainly of copper (Cu) and tin (Sn). This alloy is known for its hardness and durability, making it suitable for various applications, including sculptures and medals. Thus, the correct match for bronze is Cu and Sn.

3. **Duralumin (c) : Al, Cu, Mg and Mn (ii)**
   - Duralumin is a strong, lightweight alloy primarily composed of aluminum (Al), with copper (Cu), magnesium (Mg), and manganese (Mn) as additional constituents. This combination enhances its strength and makes it ideal for aircraft construction. Therefore, the correct match for duralumin is Al, Cu, Mg, and Mn.

4. **Magnellium (d) : Al and Mg (iii)**
   - Magnalium is an alloy made from aluminum (Al) and magnesium (Mg). It is known for being lightweight and having good strength, making it useful in applications like aircraft and automotive parts. Thus, the correct match for magnalium is Al and Mg.

### Why Other Options are Incorrect:

- **Option 1:**
  - This option incorrectly matches brass with Cu and Sn, which is actually the composition of bronze. It also mismatches the other alloys, making it incorrect.

- **Option 3:**
  - This option incorrectly matches duralumin with Al and Mg, which is the composition of magnalium. It also mismatches the other alloys, making it incorrect.

- **Option 4:**
  - This option incorrectly matches brass with Cu and Sn, which is the composition of bronze, and mismatches the other alloys, making it incorrect.

In conclusion, Option 2 correctly matches each alloy with its respective constituents, based on the standard compositions of these alloys. This is why Option 2 is the correct answer.