Question

The hottest region of Bunsen flame shown in the figure below is:

• A. region 2
• B. region 3
• C. region 4
• D. region 1

Answer 1

The correct option is A region 2

The hottest region of Bunsen flame shown in the figure is region $2$. It is just above the tip of the primary flame. It reaches about 1,500 °C (2,700 °F).

Region- 1 (Pre-heating zone)

Region- 2 (Primary combustion zone, hottest zone)

Region- 3 (lnternal zone)

Region- 4 (Secondary reaction zone)