Which of the following statements is not true about destructive distillation of coal?

Options

A. It is carried out by heating coal strongly to `1000^(@)C` in the absence of air.
B. The residue left behind after the process is a good fuel and burns without smoke.
C. The gas evolved during the process is used as a fuel in many industries situated near the coal processing plant.
D. None of these

Answer

To determine which statement is not true about the destructive distillation of coal, we need to analyze the provided statements one by one.

### Step-by-Step Solution:

1. **Understanding Destructive Distillation of Coal**:
- Destructive distillation is a process where coal is heated in the absence of air at high temperatures (around 1000 degrees Celsius). This process breaks down the coal into various products, including gases, liquids, and solid residues.

2. **Evaluating the Statements**:
- **Statement 1**: "It is carried out by heating coal strongly to 1000 degree Celsius in absence of air."
- This statement is true. Destructive distillation does involve heating coal to high temperatures in the absence of air.

- **Statement 2**: "The residue left behind after the process is a good fuel and burns without smoke."
- This statement is also true. The residue, known as coke, is a good fuel and burns with minimal smoke.

- **Statement 3**: "The gas evolved during the process is used as a fuel in many industries situated near the coal processing plant."
- This statement is true as well. The gases produced during the process, such as coal gas, are often used as fuel in nearby industries.

3. **Identifying the Incorrect Statement**:
- Since all the statements provided are true regarding the destructive distillation of coal, we need to conclude that none of the statements are incorrect based on the information provided.

### Conclusion:
Since all the statements are true, it appears that the question may be misleading or that there may be an assumption that one of the statements is incorrect. However, based on the analysis, all statements provided are accurate descriptions of the destructive distillation of coal.