Question

Arrange the different zones of a flame in increasing order of their temperature.

• A. Middle zone < Innermost zone < Outermost zone
• B. Innermost zone < Middle zone < Outermost zone
• C. Innermost zone < Outermost zone< Middle zone
• D. Outermost zone < Innermost zone < Middle zone

Answer 1

The correct option is B Innermost zone < Middle zone < Outermost zone

The innermost zone of a flame mostly has vapourised wax and very little combustion takes place there. So, its temperature is the least among all the zones of the flame.

The middle zone undergoes partial combustion due to a limited supply of oxygen and therefore has an intermediate temperature.

The outermost zone gets maximum oxygen supply and complete combustion takes place here. So, its temperature is the maximum among all the zones of the flame.

Therefore, the correct increasing order of the different zones of a flame based on their temperature is:
Innermost zone < Middle zone < Outermost zone