Wax is a hydrocarbon. When the wick is lit, the solid wax melts and becomes a liquid. This liquid soaks into the wick and in the heat it is vaporized. The flame is a zone of combustion of these vapours of wax. When a candle burns, the carbon from the wax combines with oxygen in the air. Carbon undergoes oxidation, and gets changed into carbon dioxide. At the same time hydrogen combines with air to form water vapours. Some of the carbon does not burn and is deposited as soot.
The flame of the candle is

Options

A. zone of non-combustion
B. zone of combustion
C. dark zone
D. zone of molten wax.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Candle Flame**: A candle flame is produced when the wax (which is a hydrocarbon) melts, vaporizes, and then burns in the presence of oxygen. The combustion process involves the wax vapors reacting with oxygen from the air.

2. **Identifying Zones of the Flame**: The candle flame can be divided into different zones, primarily the zone of combustion and the non-combustion zones. The zone of combustion is where the actual burning occurs.

3. **Analyzing the Options**:
- **Option 1: Zone of Non-Combustion**: This zone lacks oxygen, so combustion cannot occur here. Therefore, this option is incorrect.
- **Option 2: Zone of Combustion**: This is the correct zone where the wax vapors combine with oxygen, leading to combustion and the formation of the flame.
- **Option 3: Dark Zone**: This zone also lacks sufficient oxygen for combustion, making this option incorrect.
- **Option 4: Zone of Molten Wax**: In this zone, the wax is melted but not burning, and there is no oxygen present for combustion. Thus, this option is also incorrect.

4. **Conclusion**: The flame of the candle forms in the zone of combustion, where there is an adequate supply of oxygen for the wax vapors to burn.

**Final Answer**: The flame of the candle is in the zone of combustion.

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