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My doubt is when we light the gas stove we can see that its color is bluish-green color. but when we burn something it color is yellow-orange .why this happens?
The process of breaking down the fuel into combustible gases is called pyrolysis. Complete combustion produces the blue flame of a gas burner. Since there isn't enough oxygen to combine with all the carbon, some of it forms microscopic particles of carbon (soot) which are heated to incandescence by the flame, giving the familiar yellow or orange color of flames. This is why an excessive amount of yellow in your gas furnace flame .Most of the colors we associate with flames are black body radiation, whether the red of glowing coals, or the yellow and orange of a campfire. That's why blue and green flames are so startling.


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