Question

The hottest part of a candle flame is-
A.Luminous zone
B.Dark zone
C.Hot zone
D.Non-luminous zone

Answer 1

Hint- Because of complete combustion, the outer zone is blue in shading. This zone is the sultriest in temperature when contrasted with different zones. This blue hued zone is the non-brilliant piece of the flame.
Step-By-Step answer:
A candle flame has 3 zones. These various zones are:
Dark zone: The dark zone is the zone around the wick of the candle flame that comprises unburnt wax fume. At the point when you light the candle, the liquid wax climbs (because of a wonder called the narrow activity) and disintegrates around the wick making a dim zone. This part is 'dull' as a result of the disintegrated carbon particles shaped because of vaporization. Likewise, it is the least smoking of all the four zones.
Luminous zone: This piece of the flame is where inadequate combustion happens and a ton of warmth is created. In this zone, the liquid wax particles further disintegrate within the sight of wax and fume particles. This zone is available close to the base of the flame. This piece of the candle flame is encapsulated by a yellowish flame.
Non-Luminous zone: The non-radiant zone is the district of complete combustion. On the off chance that you take a gander at a candle flame intently (simply don't go excessively close), you will see an 'air' conformed to the candle. Since this is the zone of complete combustion (as there is a lot of oxygen present around the candle), it is likewise the most sweltering piece of the flame.
Hence, the hottest part of a candle flame is the non-luminous zone.
Thus, option D is the correct option.
Note: Just at the base of the flame you will notice a 'somewhat blue hue'. This is because of the fragmented consuming of carbon dioxide bringing about the arrangement of carbon monoxide.