During sodium extract preparation for Lassaigne's test both N and S present in organic compound change to

Options

A. NaCN and `Na_(2)S`
B. `NaNH_(2) and Na_(2)SO_(4)`
C. `NaSCN`
D. `NaNO_(3) and Na_(2)S`.

Explanation

To solve the question regarding the changes that occur during the preparation of sodium extract for Lassaigne's test, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Lassaigne's Test**:
- Lassaigne's test is a qualitative analysis method used to detect the presence of nitrogen and sulfur in organic compounds.

2. **Components of the Organic Compound**:
- An organic compound typically contains carbon (C), and in this case, it also contains nitrogen (N) and sulfur (S). Therefore, we can represent the organic compound as C + N + S.

3. **Fusion with Sodium**:
- The organic compound is fused with sodium (Na). Sodium acts as a reducing agent and helps in the conversion of nitrogen and sulfur present in the organic compound into their respective sodium salts.

4. **Reactions Involved**:
- During the fusion, nitrogen is converted into sodium cyanide (NaCN) and sulfur is converted into sodium sulfide (Na2S). However, when both nitrogen and sulfur are present in the compound, they can react together to form sodium thiocyanate (NaSCN).

5. **Final Product**:
- The final product formed from the fusion of the organic compound containing nitrogen and sulfur with sodium is sodium thiocyanate (NaSCN).

6. **Conclusion**:
- Therefore, during the sodium extract preparation for Lassaigne's test, both nitrogen and sulfur present in the organic compound change to sodium thiocyanate (NaSCN).

### Final Answer:
Both nitrogen and sulfur present in the organic compound change to sodium thiocyanate (NaSCN).

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