Correct Answer - Option 1 : Non-luminous zone
The correct answer is the Non-luminous zone.
The Hottest part of the gas flame is known as the Non-luminous zone.
- The Non-luminous zone flame is blue.
- In this zone, complete combustion of the fuel takes place because there is plenty of air around it.
- The outermost zone has the highest temperature in the flame.
It is the hottest part of the flame.
- It is quite thin as compared to the middle zone.
- A region of burning gases is called flame.
- There are three different zones of a flame:
- Dark zone.
- Luminous zone.
- Non-luminous zone
- When the oxygen supply is insufficient, the fuel burns partially by producing a yellow flame, it is said to be a luminous flame.
- A luminous flame appears to be yellow in color.
- When kerosene burned in a lamp, it produces a luminous flame.