Which of the following produces violet colour with `FeCl_(3)` solution?

Options

A. Alkyl halides
B. Ethanal
C. Enols
D. Ethanol

Answer

To determine which of the following produces a violet color with FeCl₃ solution, we will analyze the options provided and identify the correct one.

### Step-by-Step Solution:

1. **Understanding the Reaction**:
Ferric chloride (FeCl₃) is known to react with certain organic compounds, particularly those containing hydroxyl groups (–OH), to form colored complexes.

2. **Identifying the Correct Compound**:
Among the options provided, we need to identify which compound contains a hydroxyl group bonded to a carbon atom that has a double bond (this is characteristic of an enol).

3. **Analyzing the Options**:
- **Option 1: Alkyl Halide**: Alkyl halides do not react with FeCl₃ to produce a colored complex. Therefore, this option is incorrect.
- **Option 2: Ethanol**: Ethanol (an alcohol) does not produce a color change with FeCl₃ under normal conditions. Thus, this option is also incorrect.
- **Option 3: Enol (e.g., Phenol)**: Enols, such as phenol, react with FeCl₃ to form a violet-colored complex. This is the correct option.
- **Option 4: Ethanol**: As mentioned earlier, ethanol does not react to produce a color change, making this option incorrect as well.

4. **Conclusion**:
The correct answer is **Option 3: Enol**. When enols react with FeCl₃, they form a violet-colored complex.