This depends on what fuel you are burning: it must contain (at least some) carbon
Yes, camphor is an organic compound.
in ist step CO2 is formed which reduces to CO..
Yes, butane burning is a chemical change. The molecule of butane is converted to CO2 and H2O when combusted in oxygen.
Oxygen and water vapor while alive and CO2 once dead.
carbon, oxygen
If the fuel that is burnt contains hydrocarbons, yes.
The main content is the same. Of the wood is carbon and hydrogen, and that of fossil fuels is hydrogen and carbon. So when wood and fossil fuels are burnt the Carbon combines with oxygen to produce carbon dioxide and carbon monoxide, and the hydrogen combines with oxygen to produce water (H2O). C+O2--> CO2+CO
The reaction between carbon dioxide (CO2) and a burning splint is that the splint will extinguish. This is because CO2 is a non-flammable gas, which lacks oxygen to support combustion. When brought into contact with a burning splint, it displaces the oxygen and prevents the splint from continuing to burn.
food ; it is glucose and oxygen is released by plants during photosynthesis
No.
CO2 and water plus light produce glucose and oxygen.
trees. Trees produce oxygen and in return we give them Co2 (carbon dioxide).