Question

Write 4 points of luminous flame and non luminous flame???

Answer 1

1. Luminous flames are sooty while non-luminous flames are not sooty.

2. Luminous flames are not very hot while non-luminous flames are very hot.

3. Luminous flames are not steady while non-luminous flames are steady.

4. Non-luminous flames burn more efficiently than luminous flames because they are able to combine all their carbon with oxygen.

5. Luminous flames have limited access to oxygen while non-luminous flames have unlimited access to oxygen.

Answer 2

Substances which vaporize during burning gives flame.
The substance which does not vaporize during burning does not produce flame.
Flame is of two types.
1.      Luminous flame
2.      Non-luminous flame.
(1). Luminous flame: A luminous flame is a bright yellow flame which gives of light.
(2). Non-luminous flame: A non-luminous flame does glow as bright as luminous flame.
It undergoes complete oxidation, so it gets much hot (high temperature) than luminous flame.