A chemical reaction is usually accompanied by
easily observed physical effects, such as the emission of heat and light, the
formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can
only be validated by chemical analysis of the products!
1. Classification by Structural Change
2. Classification by
Acidity and Basicity 3. Classification by Functional Group 4. Reaction Characteristics 5. Factors that Influence Reactions