Pyrolysis of wood is responsible for yielding

Options

A. Presence of air
B. Absence fo air
C. Limited supply of air
D. Both B andC

Answer

**Step-by-Step Solution:**

1. **Understanding Pyrolysis**: Begin by defining pyrolysis. Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen.

2. **Role of Oxygen**: Recognize that the absence of oxygen is crucial in the pyrolysis process. If oxygen were present, the material would combust rather than decompose.

3. **Products of Pyrolysis**: Identify the products yielded from pyrolysis. The process results in the formation of combustible gases and solid residues like charcoal.

4. **Analyzing the Options**: The question provides multiple-choice answers regarding the conditions under which pyrolysis occurs. The options include:
- Presence of air
- Absence of air
- Limited supply of air
- Both B and C

5. **Selecting the Correct Answer**: Since pyrolysis specifically occurs in the absence of oxygen, the correct answer is "absence of air."

6. **Conclusion**: Summarize that pyrolysis of wood yields products like charcoal and gases, and it is characterized by the absence of air.

**Final Answer**: The pyrolysis of wood is responsible for yielding products in the absence of air.

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