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What is a sooty and non-sooty flame?

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Detailed Solution

A sooty flame is yellow and smoky due to unburnt carbon; a non-sooty flame is blue and clean due to complete combustion.

Sooty flame: Incomplete combustion, limited oxygen, yellow/orange, deposits soot (carbon).
Non-sooty flame: Complete combustion, ample oxygen, blue, no soot.
Examples: Candle wick (sooty) vs. Bunsen burner with air hole open (non-sooty).

Feature	Sooty	Non-sooty
Oxygen	Low	High
Color	Yellow/orange	Blue
Residue	Soot deposited	Clean
Heat	Less efficient	More efficient

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