Describe the various zones of a flame.

A flame has four zones in it a. the outermost thin transparent faint bluish non- luminous region of complete combustion. It is the hottest zone of the flame.b. the middle bright luminous zone of partial combustion.c. the innermost, coldest dark zone, consist of hot vapour and called as zone of no combustion.d. blue zone near the bottom of the flame is due to burning of CO. CO is formed due to incomplete combustion.
Different zones of a candle flame