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the inner most zone of a flame is less hot because it has unburnt carbon particals and combustion does not take place .thats why innermost zone of flame is less hot
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Different zones of candle flames?
These are the 4 zones of a candle flame from outermost to innermost A Non luminous zone . or zone of complete combustion b. Luminous zone or zone of incomplete combustion c. Dark zone or zone of no combustion d. Blue zone
Why the innermost flame of a candle is black?
because it is least hot and it is unburnt
What is the meaning of non luminous flames?
The non luminous flame is hot flame; the fuel is mixed with more oxygen.
How can you tell which zone on a flame is cooler and which is hotter?
The red zone is least hot. The yellow zone is more hot. The Blue zone is the hottest. The other way you can tell is by looking at the order of the colors, the outter being the least hot and the inner being the hottest.
Why is middle zone of the candle called luminous zone?
partial combustion takes place here and wax vapour start burning with a yellowwish flame . this region of candle flame is moderately hot. so it is called as the luminous zone
Why does flame burns upwards?
The flame burns "up" because it is really the hot gasses that are burning and hot gasses rise because they are less dense.
What zone of flame a gold smith use for melting gold or silver?
Because it is the hottest zone of a candle flame.
Which flame is not suitable for heating in Bunsen burner?
The yellow flame (or luminous flame) should not be used because 1. It is less hot that the blue flame (or non-luminous flame) 2. It produces soot, as compared to the blue flame which is the clean flame
Why should you use the yellow flame when the Bunsen burner is unattended?
Safety. The yellow flame is easier to see and burns much less hot.
Is the temperature of a luminous flame greater ot less than that of a nonluminous flame?
The yellow color in a luminous flame is basically the black-body emission from hot particles of soot in the flame. they are hot, and they glow like the filament of a light bulb. In a blue flame, there are no particles of soot to give that incandescent radiation. Instead, the main color you see is blue emission from the high-energy C2 molecule.
Is a luminous flame a hot flame?
All flames are hot
Characteristics of luminous flame?
Non luminous zone is the zone of a flame which is also the hottest zone of the flame as it is mostly in contact with oxygen. It is also called invisible zone.
