Water can be a product of combustion.
Both are covalent organic esters, insoluble in water and are combustable.
Yes.
yes
Only in extreme heat.
A combustable engine
Phosphorus is combustible which means that it is flammable.
if its combustable it releases energy when it burns
Sometimes there are gases that are combustable.
tasteless, colorless, non-combustable, gas (at STP)
umm im not too sure but i think you may be looking for combustable material??
Anything combustable such as dried animal dung.
If it is a sewer gas, you can detect it with a combustable gas detector.