Statement-1:Extraction of gold from its native ore involves leaching
the metal ore with dilute solution of NaCN in presence of air.
Statement-2:This is an oxidation reaction and leads to the formation of a soluble complex.

Options

A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1
B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT
a correct explanation for Statement-1
C. Statement-1 is True, Statement-2 is False.
D. Statement-1 is False, Statement-2 is True.

Explanation

To solve the given question, we need to analyze both statements regarding the extraction of gold from its native ore.

### Step-by-Step Solution:

1. **Understanding Statement 1**:
- The first statement claims that the extraction of gold from its native ore involves leaching the metal ore with a dilute solution of NaCN in the presence of air.
- This process is known as the cyanide process, where gold is extracted from its ore using sodium cyanide (NaCN) and oxygen from the air.

2. **Writing the Reaction**:
- The chemical reaction for the extraction can be represented as follows:
\[ 4 \text{Au (s)} + 8 \text{CN}^- (aq) + 2 \text{H}_2\text{O} (l) + \text{O}_2 (g) \rightarrow 4 \text{Au(CN)}_2^- (aq) + 4 \text{OH}^- (aq) \]
- In this reaction, solid gold (Au) reacts with cyanide ions (CN^-) in the presence of water and oxygen to form a soluble complex, \(\text{Au(CN)}_2^-\).

3. **Understanding Statement 2**:
- The second statement indicates that this process is an oxidation reaction leading to the formation of a soluble complex.
- In the reaction, gold (Au) is oxidized to gold ions (Au^+), which then combine with cyanide ions to form the soluble complex \(\text{Au(CN)}_2^-\).

4. **Conclusion**:
- Both statements are correct:
- Statement 1 is true because the extraction process indeed involves leaching with NaCN.
- Statement 2 is also true as it describes the process as an oxidation reaction that results in the formation of a soluble complex.
- Therefore, Statement 2 correctly explains Statement 1.

### Final Answer:
- Both Statement 1 and Statement 2 are true, and Statement 2 is the correct explanation for Statement 1.

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