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It is difficult to burn a heap of green ...

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

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The green leaves contain some water due to which the ignition temperature of leaves increases, and they do not catch fire easily while dry leaves have no water, so they catch fire easily.
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PEARSON IIT JEE FOUNDATION-COMBUSTION AND FLAME -CLASSROOM CORNER Short Answer Type Questions
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  9. Explain how the use of CNG in automobiles has reduced pollution in our...

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  10. Compare LPG and wood as fuels.

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  11. Does all combustible substances give out a flame while burning?

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  12. Why does charcoal not produce flame?

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  13. Which fuel does not burn with a flame? Comment.

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  14. Does magnesium burn with a flame? Explain in your own words.

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  15. Explain why how flame is formed.

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  16. Define incomplete and complete combustion.

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  17. Why is magnesium so flammable? Justify your answer.

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  18. What colour flame is the coolest in a candle?

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  19. How does water poured on a burning log of wood help extinguish the fir...

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  20. Why LPG is stored in liquid form?

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