Explain the different zones of a flame.

Solution
The different zones present in a candle flame are as follows.
1.  Innermost zone or the luminous zone
2.  Middle zone
3.  Outer zone or the non-luminous zone
Characteristics of the these zones are tabulated as follows:

Different zones of a candle	Innermost zone	Middle zone	Outermost zone
Temperature	Minimum	Moderate	Maximum
Combustion	Zone of unburnt carbon particles	Zone of partial combustion	Zone of complete combustion