Sodium extract of an organic compound gives blood red colour with `FeCl_3`. It contains

Options

A. not simple harmonic
B. simple harmonic with amplitude 0.2m
C. N a & S both
D. N or S

Answer

To solve the question, let's break it down step by step:

### Step 1: Understanding the Reaction
The question states that the sodium extract of an organic compound gives a blood red color with FeCl₃ (ferric chloride). This indicates a specific reaction is taking place.

### Step 2: Identifying the Key Compound
The blood red color observed in the presence of FeCl₃ suggests the formation of a complex. One well-known reaction that produces a blood red color involves thiocyanate ions (SCN⁻).

### Step 3: Sodium Thiocyanate
The sodium extract likely contains sodium thiocyanate (NaSCN). When NaSCN is dissolved in water, it dissociates into sodium ions (Na⁺) and thiocyanate ions (SCN⁻).

### Step 4: Reaction with Ferric Chloride
When thiocyanate ions (SCN⁻) react with ferric ions (Fe³⁺) from FeCl₃, they form a complex known as ferric thiocyanate (Fe(SCN)²⁺). The reaction can be represented as:
\[ \text{Fe}^{3+} + \text{SCN}^- \rightarrow \text{Fe(SCN)}^{2+} \]
This complex is responsible for the blood red color observed in the solution.

### Step 5: Conclusion on the Composition
Since the sodium extract contains NaSCN, we can conclude that the organic compound must contain:
- Sodium (Na)
- Sulfur (S)
- Carbon (C)
- Nitrogen (N)

Thus, the answer to the question is that the sodium extract contains nitrogen and sulfur.

### Final Answer
The sodium extract of the organic compound contains **nitrogen and sulfur**.

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