Name: Combustion: Burning of Substances
Uploaded: 2019-07-19
Duration: 9 min 40 s
Description: You may have seen a bonfire in the cold season, but do you know why the wood in the bonfire starts burning when we heat it? Let's explore.

Question

Draw a neat and labelled diagram of a candle flame.

Accepted Answer

The flame consists of mainly three parts. They are the inner part, middle part and the outer part.

Inner Part:

This is the innermost part of the flame. It is the part closest to the wick. It is the least hot region. This is the black part of the flames that contains unburnt particles of the carbon from the wick i.e. unburnt fuel.

Middle Part:

This is the biggest part of the flame. The colors in this are varying shades of yellow and orange. This is the luminous flame because it emits light. This part is also not extremely hot. This is because this part gets a limited supply of oxygen. So incomplete combustion takes place here. So, it burns orange and is luminous.

Outer Part:

This is the hottest part of the flame. This part has an unlimited supply of oxygen. So complete combustion takes place here. Hence it is the hottest part of the flame. Also, this part of the flames burns with a blue color. It is the non-luminous, i.e. does not emit light.

Draw a neat and labelled diagram of a candle flame.

Important Questions on Combustion and Flame

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