_______of coal is a process in which coal is heated strongly at a temperature of `1000^(@)C` in the absence of air

Options

A. Destructive distillation
B. Refining
C. Cryltallization
D. None of them

Answer

To solve the question, we need to identify the process described in the statement. The statement mentions that coal is heated strongly at a temperature of 1000°C in the absence of air.

Here’s a step-by-step solution:

1. **Understand the Process**: The question describes a method of heating coal without the presence of air. This is crucial because heating in the absence of air prevents combustion, allowing for the breakdown of coal into various products.

2. **Identify the Key Terms**: The key terms in the question are "heated strongly," "1000°C," and "absence of air." These terms are indicative of a specific chemical process.

3. **Recall Relevant Processes**: The options provided are:
- Destructive distillation
- Refining
- Crystallization
- None of them

4. **Evaluate Each Option**:
- **Destructive Distillation**: This is a process where organic materials (like coal) are heated in the absence of air, leading to the breakdown of the material and the production of gases, liquids, and solid residues.
- **Refining**: This usually refers to the purification of substances, not specifically related to the heating of coal.
- **Crystallization**: This is a process used to form solid crystals from a solution, not applicable here.
- **None of them**: This would only be correct if none of the options fit the description.

5. **Select the Correct Answer**: Given that destructive distillation is the process that matches the description of heating coal at high temperatures in the absence of air, the correct answer is "destructive distillation."

Final Answer: **Destructive distillation**

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