The 'middle oil' fraction of coaltar distillation contains

Options

A. Benzene
B. Anthracene
C. Naphthalene
D. Xylene

Answer

To answer the question regarding the 'middle oil' fraction of coal tar distillation, we can break down the information provided in the video transcript into a clear step-by-step solution.

### Step-by-Step Solution:

1. **Understanding Coal Tar Distillation**:
- Coal tar is a byproduct obtained from the carbonization of coal. It is a complex mixture of various organic compounds, primarily aromatic hydrocarbons.

2. **Fractional Distillation of Coal Tar**:
- The distillation of coal tar separates its components based on their boiling points. This process yields different fractions, each containing specific compounds.

3. **Identifying the Fractions**:
- The distillation process typically yields several fractions:
- **First Fraction (Crude Light Oil)**: Contains lighter aromatic hydrocarbons such as benzene, toluene, and xylene.
- **Second Fraction (Middle Oil)**: This is the fraction we are interested in, which contains naphthalene.
- **Third Fraction (Green Oil)**: Contains heavier compounds, primarily phenanthrene.

4. **Conclusion**:
- The 'middle oil' fraction of coal tar distillation specifically contains **naphthalene**.

### Final Answer:
The 'middle oil' fraction of coal tar distillation contains **naphthalene**.

---