Question : The hottest part of the gas flame is known as
Option 1: blue zone
Option 2: non-luminous zone
Option 3: luminous zone
Option 4: dark zone
Correct Answer: non-luminous zone
Solution : The correct option is a non-luminous zone .
The hottest part of a gas flame is referred to as the non-luminous zone. This area is also called the inner cone or non-luminous flame. In this zone, combustion occurs more completely as there is a sufficient supply of oxygen, which results in a more efficient and hotter burning process.
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