Why is the non luminous zone of a candle flame hottest?
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Explanation:
A non-luminous flame undergoes complete combustion as it draws much more oxygen and gets much hotter. There are several "zones" within a non-luminous flame, and each zone has a different temperature. The outermost zone of the flame is blue in colour and it is the hottest part. ... This is because of partial combustion.
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Outermost nonluminous zone of complete combustion =
This zone is faintly visible and surrounds the yellow luminous part of the flame. In this zone, the wax vapour undergoes complete combustion because plenty of air is present around it. This zone is hottest part of the candle flame. The non luminous zone of candle flame is
hot because of partial combustion
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