Reaction: Learn the meaning and usage

Learn the meaning and usage of the word reaction in different contexts, such as chemistry, physics, psychology, and politics. Find synonyms, antonyms, and related terms for reaction in the online thesaurus. Learn the meaning of reaction as a noun in different contexts, such as chemistry, medicine, politics, and psychology. Find synonyms, sentences, and pronunciation of reaction in British and American English. The Sandmeyer reaction is a chemical reaction which is used to synthesize aryl halides from aryl diazonium salts. This reaction is a method for substitution of an aromatic amino group by preparing diazonium salt, that is followed by its displacement and copper salts often catalyze it. A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.