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Why is black soot formed when the flame is luminous?
The black deposit produced represents soot particles, heated to incandescence. It comes about when the combustion of air is insufficient.
Is the inner part of a luminous flame yellow?
Yes, the inner part of a luminous flame is typically yellow. The yellow color is due to the incomplete combustion of carbon particles present in the flame.
When do you get yellow soot in the burner flame?
Yellow soot is obtained when the holes of the burner are not clean. The combustion is incomplete. The yellow soot or yellow flame is because of unburnt carbon particles.
What is produced after a fire?
Fire releases heat and carbon dioxide. The carbon depends on how the fire is burnt. Unburnt hydrocarbons are released if fire is not complete.
Why does a non luminous zone produce less residue as compared to a luminous one?
In the luminous zone of a flame solids such as carbon are produced because there is only a small supply of oxygen to burn the fuel. In the non-luminous zone there is more oxygen and the fuel is completely oxidised to gases such as carbon dioxide.
