Chapter 4: Combustion and Flame

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Combustion and Flame


It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.


The lowest temperature at which a combustible substance catches fire when heated in the air is called its ignition temperature. The green leaves hold some amount of water while the dry leaves do not have water. So, the water in the green leaves increase the ignition temperature and it takes longer time to burn as compared to dry leaves

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