A flame is the visible gaseous part of a fire. It is a zone of combustion of gaseous substances accompanied by evolution of heat and light. All substances do not burn with a flame. Only those substances that vaporise during burning produce flame. A candle flame is taken to study the various zones of a flame.

Which zone of a candle flame is the zone of no combustion?

Options

A. Outermost zone
B. Middle zone
C. Innermost zone
D. None of these

Answer

C

Explanation

Innermost zone is called the zone of no combustion or dark zone.