Which is the hottest part in the flame of the candle ?

Options

A. Blue
B. Yellow
C. Black
D. Wax part

Explanation

**Step-by-Step Solution:**

1. **Understanding the Flame Structure**: A candle flame consists of different zones, each with varying temperatures and characteristics. The flame can be divided into three main parts: the outer blue part, the middle yellow part, and the inner black part.

2. **Identifying the Zones**:
- **Outer Blue Zone**: This part of the flame is where complete combustion occurs. It is characterized by a blue color and is known as the non-luminous zone.
- **Middle Yellow Zone**: This zone is yellow and is known as the luminous zone. It indicates incomplete combustion and is moderately hot.
- **Inner Black Zone**: This is the innermost part of the flame, which is dark and represents the least hot area of the flame.

3. **Determining the Hottest Part**: Among these zones, the outer blue zone is the hottest part of the flame because it is where complete combustion takes place. This means that the fuel (wax) is burning efficiently, producing the most heat.

4. **Conclusion**: Therefore, the hottest part of the flame of a candle is the blue part.

**Final Answer**: The hottest part of the flame of a candle is the blue part.

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