Extraction of gold and silver involves leaching with `CN^(-)`ion.silver is later recovered by:

Options

A. liquation
B. distillation
C. zone refining
D. displacement with Zn

Explanation

To solve the question regarding the recovery of silver after its extraction through leaching with cyanide ions, we can break down the process into clear steps:

### Step-by-Step Solution:

1. **Understanding Leaching with Cyanide**:
- The extraction of silver involves leaching the ore with sodium cyanide (NaCN). This process allows the silver to dissolve in the solution, forming a soluble complex, specifically silver cyanide (Ag(CN)₂⁻).

2. **Formation of Silver Cyanide Complex**:
- The reaction can be represented as:
\[ \text{Ag}_{\text{impure}} + \text{NaCN} \rightarrow \text{Ag(CN)}_2^{-} + \text{Na}^+ \]
- In this reaction, the impure silver reacts with sodium cyanide to form the soluble silver cyanide complex.

3. **Recovery of Silver**:
- To recover the silver from the silver cyanide complex, a reducing agent is used. Zinc (Zn) is commonly employed for this purpose because it has a lower standard reduction potential compared to silver.

4. **Displacement Reaction**:
- The reaction between silver cyanide and zinc can be represented as:
\[ \text{Ag(CN)}_2^{-} + \text{Zn} \rightarrow \text{Ag}_{\text{pure}} + \text{Zn(CN)}_2 \]
- Here, zinc displaces silver from the complex, resulting in the formation of pure silver and a new complex with zinc.

5. **Conclusion**:
- The method for recovering silver after leaching with cyanide is through **displacement with zinc**.

### Final Answer:
Silver is later recovered by **displacement with zinc**.

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