b)Distinguish between outermost and middle zone of a candle flame on the basis of
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A flame consist of three zones. ... 1) The Innermost zone of a flame is dark or black:It consist of hot,unburnt vapours of the combustible material.It is the least hot part of the flame.It is the coldest part of the flame. 2)The middle zone of a flame is yellow:It is bright and luminous.
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the outermost zone is the hottest among all zones and is blue in colour. ... the middle zone of flame is moderately hot and is yellow in colour ,partial combustion of fuel takes place here. the innermost zone of flame is least hot and is black in colour. This is due to presence of unburnt wax particles.
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