1. Darkening of eggplant
2. Burning of paper
3. Decaying garbage
4. Rusting of iron
5.Fish kill
A. a reaction that occurs when oxygen combines with other substances producing flame and heat
B. color changes observed commonly among vegetables and fruits
C.a reaction of iron with oxygen present in the air
D. occurs when there is lack of oxygen in the ponds or bodies of water
E. breakdown of materials due to bacteria and fungus ​