Chemical reactions are processes in which one or more substances (reactants) are transformed into one or more different substances (products). These reactions involve the breaking and forming of chemical bonds between atoms. Chemical reactions can be categorized into different types, such as synthesis, decomposition, single displacement, double displacement, combustion, and redox reactions. Understanding chemical reactions is essential in fields such as chemistry, biology, and materials science, as they are fundamental to the functioning of living organisms and the production of a wide range of materials and products. Researchers study chemical reactions to understand the underlying mechanisms, optimize reaction conditions, develop new materials, and design more efficient and sustainable processes.