Chemical equations are used to describe a chemical transformation of elementary particles that takes place during a reaction, and are described using chemical symbols. A chemical reaction occurs under conducive conditions like suitable pressure, concentration and temperature. At any given moment, there may be thousands of chemical reactions taking place in and around us. Some reactions are rapid and spontaneous, and occur instantly. Several others are non-spontaneous and need a catalyst or an external source of energy (like heat, light, etc.) to proceed further. Primarily, reactions can be exothermic (in which energy is released) or endothermic (in which energy is absorbed). Reactions can be studied under two different branches of chemistry, namely, inorganic chemistry and organic chemistry. This article enlists the types of reactions from both the fields. All the occurrences and chemical processes that involve inorganic compounds and chemical elements fall under this category. The reactions of these elements, their combinations, breakdown of compounds, etc., is classified into 6 major types of chemical reactions. Organic chemistry is the study of the characteristics, mechanisms, reactions and structures of organic materials, i.e. compounds that contain carbon atoms in various forms. Organic compounds form the basic structure of life on Earth and have varied structures. They are very diverse, hence the reactions of these compounds are broadly classified into 4 categories. The biochemical reactions that govern and regulate our metabolic processes are also a type of chemical reactions. There is a long, never-ending list of chemical changes taking place every second. They are present everywhere and hence, it is important to know the types of chemical reactions. It is fun to study these and will provide a better understanding of chemistry as a science.