Question

The hottest region in Bunsen flame shown in the figure given is:

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

Answer 1

The correct option is A Region 2

$\text{Region 1-}$ Pre-heating zone
$\text{Region 2-}$ Primary combustion zone(Hottest region)
$\text{Region 3-}$ Internal zone
$\text{Region 4-}$ Secondary reaction zone
Primary combustion zone is the hottest region.