Question

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

• A. Middle zone< inner zone < outermost zone
• B. Inner zone < middle zone < outermost zone
• C. Inner zone < outermost zone< middle zone
• D. Outermost zone < inner zone < middle zone

Answer 1

The correct option is B Inner zone < middle zone < outermost zone

The inner zone of a flame mostly has vapourised wax and very little combustion takes place there. So, its temperature is least.
The middle zone undergoes partial combustion and therefore has an intermediate temperature.
The outermost zone gets maximum oxygen supply and complete combustion takes place here. So, its temperature is maximum.