Question 9
It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.

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Solution

Green leaves have a lot of moisture in them. This moisture does not allow them to catch fire easily. However, dry leaves have no moisture in them. Therefore, they catch fire easily.

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Similar questions

A heap of green leaves is lying in one corner of a park. The green leaves in the heap burn with difficulty because :

(a) they contain a tough material called cellulose

(b) they contain a lot of water

(d) they do not get sufficient oxygen for burning

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