Nucleophilic attack The nucleofugic departure Nucleophilic attack of hydroxide ion on chloromethane The acid-catalyzed reaction of the bromide ion on ethanol Electrophilic attack Addition of bromine to ethene Addition of HCl to propene The Markovnikov Rule Substitution of the sulfonitrile mixture on the benzene Acid-catalyzed esterification Photochemical reaction of bromine on methane Polymerization of alkenes