Which of these substances is obtained in a solid state during the destructive distillation of coal?

Options

A. Coke
B. Coal tar
C. Coal gas
D. Ammoniacal liquor

Answer

To solve the question "Which of these substances is obtained in a solid state during the destructive distillation of coal?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Destructive Distillation**: Destructive distillation is a process where organic material (like coal) is heated in the absence of air. This prevents combustion and allows the material to break down into various components.

**Hint**: Remember that destructive distillation occurs without oxygen to prevent burning.

2. **Identify the Products of Destructive Distillation**: When coal undergoes destructive distillation, it produces several by-products. The main products are:
- Coal gas (a gaseous product)
- Coal tar (a liquid product)
- Coke (a solid product)

**Hint**: Think about the states of matter (solid, liquid, gas) when considering the products.

3. **Determine the State of Each Product**:
- **Coal gas**: This is in a gaseous state.
- **Coal tar**: This is in a liquid state.
- **Coke**: This is the solid residue left after the distillation process.

**Hint**: Focus on the physical state of each product to identify which one is solid.

4. **Identify the Solid Substance**: Among the products listed, coke is the only substance that is obtained in a solid state during the destructive distillation of coal.

**Hint**: Recall that coke is often used as a fuel and in the production of steel, which can help you remember its solid state.

### Final Answer:
The substance obtained in a solid state during the destructive distillation of coal is **coke**.

---