Which have melting point below `500^(@)C `

Options

A. Ag, Cu
B. Zn, Cd
C. Cd, Cu
D. Ag, Zn

Explanation

To determine which of the given elements have a melting point below 500°C, we will analyze the melting points of each element mentioned: Silver (Ag), Copper (Cu), Zinc (Zn), and Cadmium (Cd).

### Step-by-Step Solution:

1. **Identify the Elements and Their Melting Points**:
- Silver (Ag): 961°C
- Copper (Cu): 1084°C
- Zinc (Zn): 419°C
- Cadmium (Cd): 321°C

2. **Compare Each Melting Point to 500°C**:
- Silver (Ag): 961°C > 500°C
- Copper (Cu): 1084°C > 500°C
- Zinc (Zn): 419°C < 500°C
- Cadmium (Cd): 321°C < 500°C

3. **Determine Which Elements Have Melting Points Below 500°C**:
- From the comparison, we see that Zinc (Zn) and Cadmium (Cd) have melting points below 500°C.

4. **Conclusion**:
- The elements that have melting points below 500°C are **Zinc (Zn)** and **Cadmium (Cd)**.

### Final Answer:
Zinc (Zn) and Cadmium (Cd) have melting points below 500°C.