Question

We know that air is needed for combustion or burning of fuels. Which component of air actually supports combustion ?

Answer 1

Oxygen gas in the air supports combustion.

Have you ever tried to burn a candle in absence of air If you would try you would notice that it doesn’t burn in absence of air. Air contains some matter which supports combustion. This substance is oxygen. Oxygen is one of the major components of air around us. Air comprises almost 21% oxygen.