Sodium extract gives blood red colour when treated with `FeCl_(3)`. Formation of blood red colour confirms the presence of

Options

A. Only nitrogen
B. Only sulphur
C. Only halogens
D. Both Nitrogen and Sulphur

Answer

To determine the presence of elements in a compound using sodium extract and FeCl3, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Sodium Fusion Test**:
- The sodium fusion test, also known as the Lassaigne's test, is used to detect the presence of certain elements like nitrogen, sulfur, and halogens in organic compounds.

2. **Preparation of Sodium Extract**:
- A small piece of sodium is heated in a test tube until it becomes a shiny globule.
- The organic compound is then added to the molten sodium and heated until it turns red hot.
- After cooling, the mixture is dissolved in distilled water to obtain the sodium extract.

3. **Testing with FeCl3**:
- The sodium extract is treated with ferric chloride (FeCl3).
- If the extract contains thiocyanate ions (SCN⁻), a blood red complex known as ferric thiocyanate (Fe(SCN)₃) will form.

4. **Observation of Color Change**:
- The formation of a blood red color indicates the presence of thiocyanate ions in the solution, which suggests the presence of nitrogen and sulfur in the original compound.

5. **Conclusion**:
- The blood red color confirms the presence of both nitrogen and sulfur in the compound. Therefore, the correct answer is that the formation of blood red color confirms the presence of both nitrogen and sulfur.

### Final Answer:
The formation of blood red color confirms the presence of both nitrogen and sulfur.

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