Define octane and cetane numbers, prepare alkanes, alkenes and alkynes by every named route, and predict the product of any addition to a double or triple bond, peroxides included.
Unit 3, Organic chemistry, carries 17 of the 50 chemistry marks; with eleven chapters sharing them, this one averages a little over one and a half (MEC publishes weights by unit, not by chapter). It is one of the two or three chapters in the unit that reward reading twice, because the addition rules reappear in alcohols, aldehydes and haloalkanes.
MEC scope: Cracking, pyrolysis and reforming; quality of gasoline, octane number, cetane number and gasoline additives; Isomerism, IUPAC names and general methods of preparation of alkanes, alkenes and alkynes; Chemical properties of ethane; Addition reactions of alkenes; Addition reactions and acidity of alkynes.
Three ways it is asked:
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