5.
1. What is a flame? What are the attributes of a good fuel?
Describe the various zones of a candle flame with the help of a neat labelled diagram.
Answers
Explanation:
There are three zones in flame, viz. outer zone, middle zone and inner zone. Outer Zone: This zone is blue in colour. It is the hottest part of the flame, because complete combustion takes place in this zone.
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class eight combustion structure of flame subject notes - Excellup.com
Answer:
A candle flame consists of three different zones. Each zone has different temperatures. Every zone has a different colour and this will help us in understanding the temperatures of each zone.
The first zone is called the Outer zone
The second zone is called the Middle zone
The third zone is called as Inner zone
Due to complete combustion, the outer zone is blue. This zone is the hottest when compared to the other zones. This blue coloured zone is the non-luminous part of the flame.
The yellow colour region which is the bright part of the flame is the middle zone. It is moderately hot and partial combustion of fuel takes place