Which gives violet colour with borax?

Options

A. Fe
B. Pb
C. Co
D. Mn

Answer

To determine which metal gives a violet color with borax, we will analyze the behavior of each metal when heated with borax in a flame test.

### Step-by-Step Solution:

1. **Identify the Metals**: The metals provided in the question are iron, lead, cobalt, and manganese.

2. **Test Iron**:
- In an oxidizing flame:
- Hot: Iron gives a yellowish-brown color.
- Cold: Iron gives a yellow color.
- In a reducing flame:
- Hot: Iron gives a green color.
- Cold: Iron gives a green color.
- **Conclusion**: Iron does not give a violet color with borax.

3. **Test Lead**:
- Lead does not impart any color when tested with borax.
- **Conclusion**: Lead does not give a violet color with borax.

4. **Test Cobalt**:
- In both oxidizing and reducing flames:
- Hot and Cold: Cobalt gives a blue color.
- **Conclusion**: Cobalt does not give a violet color with borax.

5. **Test Manganese**:
- In an oxidizing flame:
- Hot: Manganese gives a violet color.
- Cold: Manganese gives an amethyst color.
- In a reducing flame:
- Hot: Manganese gives a colorless result.
- Cold: Manganese gives a colorless result.
- **Conclusion**: Manganese gives a violet color with borax in a hot oxidizing flame.

6. **Final Answer**: The metal that gives a violet color with borax is **Manganese**.