Match the compound with the metal for which it is used for the process of extraction.
`{:("(i) NaCN","(a) Titanium"),("(ii) Iodine","(b) Aluminium"),("(iii) Cryolite","(c) Silver ore"):}`

Options

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

Answer

To solve the question of matching the compounds with the metals for which they are used in the extraction process, we can follow these steps:

### Step 1: Identify the compounds and their uses
1. **NaCN (Sodium Cyanide)**: This compound is primarily used in the cyanide process for extracting silver from its ore. The reaction involves silver sulfide (Ag₂S) reacting with NaCN to form a complex that allows for the extraction of silver.

2. **Iodine**: Iodine is used in the extraction of titanium. When impure titanium is treated with iodine, it forms titanium iodide (TiI₄), which can then be decomposed to yield pure titanium.

3. **Cryolite (Na₃AlF₆)**: Cryolite is used in the Hall-Héroult process for extracting aluminum. It serves as a flux that lowers the melting point of alumina (Al₂O₃) and increases the conductivity of the solution.

### Step 2: Match each compound with the corresponding metal
- **NaCN** is used for **Silver** (Ag), so we match it with (c) Silver ore.
- **Iodine** is used for **Titanium** (Ti), so we match it with (a) Titanium.
- **Cryolite** is used for **Aluminum** (Al), so we match it with (b) Aluminium.

### Step 3: Write down the final matches
- (i) NaCN → (c) Silver ore
- (ii) Iodine → (a) Titanium
- (iii) Cryolite → (b) Aluminium

### Final Answer:
1. NaCN → c (Silver ore)
2. Iodine → a (Titanium)
3. Cryolite → b (Aluminium)