Match the following processes of metallurgy with their corresponding ore for which they are used :
(i) Froth floatation method
(a) Germanium
(ii) Electrolytic refining of metals
(b) ZnS
(iii) Zone refining of metals
(c) copper

Options

A. (i) - (c), (ii) - (a), (iii) - (b)
B. (i) - (b), (ii) - (c), (iii) - (a)
C. (i) - (a), (ii) - (c), (iii) - (b)
D. (i) - (a), (ii) - (b), (iii) - (c)

Answer

To solve the problem of matching the processes of metallurgy with their corresponding ores, we will analyze each process and determine the correct ore associated with it.

### Step-by-Step Solution:

1. **Froth Flotation Method**:
- This method is primarily used for the concentration of ores, especially sulfide ores.
- The process involves the separation of hydrophobic (water-repelling) mineral particles from hydrophilic (water-attracting) gangue particles.
- The ore that is commonly concentrated using this method is **Zinc Sulfide (ZnS)**.
- **Match**: (i) Froth flotation method → (b) ZnS

2. **Electrolytic Refining of Metals**:
- This method involves electrolysis, where a crude metal is used as the anode and pure metal is deposited at the cathode.
- The process is commonly used for refining metals like copper.
- **Match**: (ii) Electrolytic refining of metals → (c) Copper

3. **Zone Refining of Metals**:
- Zone refining is a technique used to obtain high-purity metals, particularly semiconductors.
- This method is typically used for germanium (Ge) and silicon (Si).
- **Match**: (iii) Zone refining of metals → (a) Germanium

### Final Matches:
- (i) Froth flotation method → (b) ZnS
- (ii) Electrolytic refining of metals → (c) Copper
- (iii) Zone refining of metals → (a) Germanium

### Summary of Matches:
1. Froth flotation method → ZnS
2. Electrolytic refining of metals → Copper
3. Zone refining of metals → Germanium