EVERYDAY SCIENCE

Detailed explanation-1: -Non-luminous flames are the ones that burn blue. These flames have access to as much oxygen as they could possibly use, so they can burn very efficiently. All of the carbon that gets used can be turned into CO2, so there’s actually no soot.

Detailed explanation-2: -Complete combustion results in a blue flame, and no soot is formed. The temperature of a blue flame is hotter than that of a yellow flame.

Detailed explanation-3: -In chemistry, there are two types of flames, which are luminous and non-luminous flame. The luminous flame majorly produces a lot of light and soot and is used for lighting, while non-luminous is majorly used in labs due to too much heat it produces.

Detailed explanation-4: -The yellow or red flames are due to incandescence of very fine soot particles that are produced in the flame. This type of red flames only burns at around 1, 000 °C, as noted on the flame color temperature chart. Depending on the lighting, you may have actually seen the soot rising from the flame.

Detailed explanation-5: -Soot cannot be produced in a premixed flame, Prof. Hallett says, because the fuel is already in contact with oxygen and does not have the chance to produce soot. The blue colour comes from chemicals produced during combustion.