During Lasaigne's test nitrogen containing organic compound when fused with sodium metal forms 'X' while sulphur containing organic compound. When fused with sodium metal forms 'Y' Then identify X and Y :

Options

A. `X=NaCN,Y=Na_(2)S`
B. `X=NaNC,Y=Na_(2)S`
C. `X=NaNO_(2),Y=Na_(2)SO_(4)`
D. `X=NaCN_(2),Y=Na_(2)SO_(4)`

Answer

To solve the problem regarding Lassaigne's test, we will identify the compounds formed when nitrogen-containing and sulfur-containing organic compounds are fused with sodium metal.

### Step-by-Step Solution:

1. **Understanding Lassaigne's Test**:
- Lassaigne's test is a qualitative analysis method used to detect the presence of nitrogen, sulfur, and halogens in organic compounds.
- In this test, the organic compound is fused with sodium metal, which converts the elements into their corresponding inorganic salts.

2. **Fusing Nitrogen-Containing Compounds**:
- When a nitrogen-containing organic compound is fused with sodium, it forms sodium cyanide (NaCN).
- This occurs because the nitrogen in the organic compound is converted into cyanide ion (CN⁻) during the fusion process.

3. **Fusing Sulfur-Containing Compounds**:
- When a sulfur-containing organic compound is fused with sodium, it forms sodium sulfide (Na2S).
- The sulfur in the organic compound is converted into sulfide ion (S²⁻) during the fusion.

4. **Identifying X and Y**:
- From the above reactions, we can identify:
- **X** (from nitrogen-containing compound) = NaCN (sodium cyanide)
- **Y** (from sulfur-containing compound) = Na2S (sodium sulfide)

5. **Conclusion**:
- Therefore, the final answer is:
- X = NaCN
- Y = Na2S

### Summary:
- X = Sodium Cyanide (NaCN)
- Y = Sodium Sulfide (Na2S)