Question

Under which conditions Bunsen burner produce luminous and non luminous flame

Answer 1

Answer:

Luminous flame is formed when the air hole is closed thus the gas will only mix with surrounding air at the point of combustion at the top of the burner and is yellow due to an incomplete reaction.

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Answer 2

Bunsen burner produces luminous and non-luminous flame:

• The visible gaseous portion of the fire is referred to as a flame.
• Exothermic reactions in a thin zone produce a flame.
• Flames can be divided into two types: (a) luminous and (b) non-luminous flame.
• When the air opening in a Bunsen Burner is closed, a brilliant flame appears.
• When the air hole in a Bunsen burner is open, it produces non-luminous flames.

Examples:

• Burning wood, candles, the Olympic cauldron, and other brilliant flames are examples.