<P> Liquid fuels are contrasted with solid fuels and gaseous fuels . </P> <P> Some common properties of liquid fuels are that they are easy to transport, and can be handled with relative ease . Also they are relatively easy to use for all engineering applications, and home use . (Fuels like Kerosene are rationed and available in government subsidized shops in India for home use .) Liquid fuels are also used most popularly in Internal combustion engines . </P> <P> Some very technically important properties include: flash point, fire point, cloud point, and pour point . </P> <P> Most liquid fuels used currently are produced from petroleum . The most notable of these is gasoline . Scientists generally accept that petroleum formed from the fossilized remains of dead plants and animals by exposure to heat and pressure in the Earth's crust . </P>

What are the properties of an ideal combustible fuel