Question

In combustion and flame chapter, first lesson, (Essential conditions required for combustion), video, in second case why can't the candle burn, as from top oxygen can enter.

Answer 1

Dear Student,
In second case the candle is not kept on wooden board . Hence , oxygen will come only from the top and not from the bottom . There will be no proper circulation of oxygen in second case. Hence , after sometime candle will stop to burn. But in first case the oxygen will come both from the top as well as from the bottom. Hence , there will be proper circulation of air.