Question

8. A pile of hay lying in the field caught
fire without a flame. What type of
combustion is it and why?​

Answer 1

Answer:

This fire is not caused by an external action

This kind of combustion where the fire initiates internally and not externally is known as spontaneous combustion.

Answer 2

Answer:

When a pile of hay catches fire without any flames from outside, then it cannot be said that there was any external source for the ignition. This kind of combustion where the fire initiates internally and not externally is known as spontaneous combustion