The document defines and provides examples of 5 main types of chemical reactions: synthesis, decomposition, single-replacement, double-replacement, and combustion. It describes synthesis reactions as forming new compounds from reactants combining. Decomposition reactions involve a single compound breaking down into multiple products. Single-replacement reactions occur when one element replaces a similar element in a compound. Double-replacement reactions involve ion exchange between compounds forming new compounds. Combustion reactions involve a fuel combining with oxygen to produce energy, water, and carbon dioxide.

1. Types of Chemical Reactions Section 8.2