Question

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

Answer 1

Green and dry leaves:

1. The presence of chlorophyll and moisture in the leaves gives them a green color.
2. When leaves lose their chlorophyll and moisture they become dry and faded in color.
3. Water content is higher in green leaves due to which their ignition temperature is higher. Dry leaves have low ignition temperatures because of less water content.
4. Due to high ignition temperature green leaves are difficult to burn.

Therefore, Dry leaves catch fire easily because of the low ignition temperature.