burning fuel reactions are useful because when energy is released and be converted into different forms they do useful work.. sorry find out your self about what useful works ......
yes some chemical reactions are harmful to us. as digestion of food, photosynthesis, decomposition of organic waste are some examples of the useful chemical reactions.
Burning.
All burning reactions involve chemical reactions (chemical changes).
Cooking and burning involve chemical reactions.
Yeah...... For burning....
Oxygen
Smokeless burning mosquito coils are caused by chemical reactions. These reactions cause odors that attract mosquitoes but then kill them.
Combustion of fuels like gasoline, chemical reactions like the detonation of explosives, and reactions involving highly reactive elements like sodium with water are examples of explosive reactions that release large amounts of energy rapidly.
Burning flames and explosions typically occur in exothermic reactions where heat is released, such as combustion reactions. These reactions involve a rapid release of energy in the form of heat and light.
Anabolic reactions form organs and tissues of the body.
The products of a burning reaction is absorbed into the atmosphere. Hope this helps :)