Middle zone of a candle falme burns with a yellow flame.

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Solution

The innermost zone, directly above the wick, containswax that has been vaporized but that is unburnt. It is the darkest zone. The middle zone is yellow and luminous because As it is an oxygen depleted zone, insufficient oxygen exists to burn all of the wax vapor. As such, partial combustion of wax takes place.

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Similar questions

	Column I		Column II
(a)	Hottest zone of a candle flame	(i)	Zone of unburnt wax vapours
(b)	Yellow zone of a candle flame	(ii)	Non-luminous zone
(c)	Black innermost zone of the candle flame	(iii)	Incomplete combustion zone

(a) Make a labelled diagram of a candle flame:

(b) What makes the middle zone of a candle flame luminous (or light-giving) ?

The middle zone of a candle flame is also called the zone of ______ combustion.

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