Chemistry - Salt Analysis Question with Solution | TestHub

The lowest temperature zone in a Bunsen burner flame is the innermost zone (I), often called the dark zone. This region consists of unburnt gas and vapors that have not yet reacted with oxygen. Because no combustion occurs in this specific area, the temperature remains significantly lower (around 300°C) than the surrounding parts. In contrast, the outer zones involve active chemical reactions, which generate the intense heat characteristic of the flame.