Effects of Chemical Reaction

• Acid rain - caused by nitrogen oxide and sulfur dioxide produced by both natural processes and combustion of fossil fuels; these oxides react with oxygen and water to give nitric acid and sulfur acid.
• Formation of the ozone layer in the atmosphere - begins with photolysis of oxygen molecules by solar radiation of wavelength below 240 mm.
• Photochemical smog - a type of air pollution that happens when primary pollutants such as nitrogen oxide and volatile organic compounds react with dioxide and the ozone layer under the influence of sunlight.
• Fire control - various materials act as fuel to sustain fire so different fire prevention and control measures are recommended for ordinary combustibles, flammable liquids or gases, electrical equipment and flammable metals.
• Corrosion control - a natural process which can convert a refined metal to a more chemically stable form such as its oxide, hydroxide, or sulfide; gradual destruction of materials by chemical or electrochemical reaction with their environment.
• Food processing and preservation - chemical reactions in food can be indicated by a sudden change in appearance, smell, or taste.