The colour of the flame with the highest amount of heat is

Options

A. white
B. yellow
C. red
D. blue

Answer

### Step-by-Step Solution:

1. **Understanding Flame Colors**: Flames can exhibit different colors based on the combustion process and the amount of oxygen available. The primary colors of flames are blue, yellow, and black.

2. **Identifying the Hottest Flame**: Among these colors, the blue flame is known to be the hottest. This is because a blue flame indicates complete combustion, which occurs when there is a sufficient supply of oxygen.

3. **Explaining the Zones of Flame**:
- **Blue Flame**: This is the outermost zone of the flame, known as the non-luminous zone. It represents complete combustion and is the hottest part of the flame.
- **Yellow Flame**: This color indicates a luminous zone where combustion is not complete. It has a limited supply of oxygen and is moderately hot.
- **Black Flame**: This is the innermost zone of the flame, also referred to as the dark zone. It indicates incomplete combustion and is the least hot.

4. **Conclusion**: Since the blue flame represents the highest amount of heat due to complete combustion, the answer to the question is that the color of the flame with the highest amount of heat is **blue**.

### Final Answer:
The color of the flame with the highest amount of heat is **blue**.

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