Question

In a candle flame, what is the colour of : (a) innermost zone (b) middle zone, and (c) outer zone ?

Answer 1

1. The first zone is called the Outer zone
2. The seconde zone is called the Middle zone
3. The third zone is called as Inner zone

Due to complete combustion, the outer zone is blue in color. This zone is the hottest in temperature when compared to the other zones. This blue colored zone is the non luminous part of the flame.

The yellow color region which is the bright part of the flame is the middle zone. It is moderately hot and partial combustion of fuel takes place.

The least hot region of the flame is present innermost. This inner zone is black in color due to the presence of unburnt wax vapors.