What are the kinds of fire and its definition?

Answer 1

There is no such thing as different "kinds" of fire. A fire's property depends entirely on the fuel it is burning, and the environment it is burning in. Natural gas burns blue, while gasoline burns a smoke, red-orange flame.

The basic definition of fire is the rapid oxidization of something - that is, in laymen terms, the addition of oxygen to a oxidization substance. Fire is, however, very rapid oxidization. Your body also oxidizes sugar that you eat, but at a much slower rate. Rust is the oxidization of iron in air, but very slowly. If you burn steel wool, the iron in the steel is turning into rust from oxidization, but at a much faster rate.

An example of simple oxidization is the combustion of hydrogen. When you burn hydrogen in enough oxygen, two hydrogen atoms attach to an oxygen atom in the environment or from an oxidizer, forming water in the form of a vapor. Most combustible substances contains carbon atoms, and thus forms smoke (carbon monoxide and dioxidee).

Some other elements, like chlorine and fluorine, can also sustain combustion in place of oxygen. But they are rather dangerous and since oxygen is abundant in our atmosphere, most fires are defined as the oxidization of it.