Which of the following flames is produced by a candle?

Options

A. Blue flame
B. non-luminous
C. light giving flame
D. yellow luminous flame

Answer

To determine which flames are produced by a candle, we need to analyze the combustion process that occurs when a candle burns.

### Step-by-Step Solution:

1. **Understanding Candle Combustion**:
- When a candle burns, it undergoes a combustion reaction. This involves the wax (usually paraffin) reacting with oxygen in the air.

2. **Types of Flames**:
- There are two types of flames that can be produced during the combustion of a candle:
- **Non-luminous Flame**: This flame is produced when there is complete combustion of the wax. In this case, the wax burns efficiently with enough oxygen, producing a blue flame. This flame is not visible or is less visible because it does not emit much light.
- **Luminous Flame**: This flame is produced when there is incomplete combustion of the wax. In this case, there is not enough oxygen for the wax to burn completely, leading to the production of soot and a yellow flame. This flame is bright and visible.

3. **Identifying the Flames**:
- The non-luminous flame (blue) occurs at the base of the candle where the combustion is more efficient.
- The luminous flame (yellow) is seen above the wick where the combustion is less efficient, resulting in the production of soot.

4. **Conclusion**:
- Therefore, a candle produces both a non-luminous flame (blue) and a luminous flame (yellow). The question asks for the types of flames produced by a candle, so the answer includes both types.

### Final Answer:
The flames produced by a candle are the non-luminous flame (blue) and the luminous flame (yellow).

---