Shortages (in the technical sense) may be caused by: 1  Price ceilings, a type of price control which involves a government-imposed limit on the price of a product service. 2  Anti-price gouging laws. 3  Government ban on the sale of a product or service, such as prostitution or certain recreational drugs.
Noun. 1. addition reaction-a chemical reaction in which one molecule is added to another. chemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; there was a chemical reaction of the lime with the ground water. 1  Facebook. 2  Twitter.
Electrophilic Addition Reactions Electrophilic addition reactions are an important class of reactions that allow the interconversion of C=C and C â¡ C into a range of important functional groups.onceptually, addition is the reverse of elimination What does the term  electrophilic addition  imply? A electrophile, E + , is an electron poor species that will react with an electron rich species (the C=C) An addition implies that two systems combine to a single entity.