A-Level CAIE Chemistry AS 14.2.1—Preparation of alkenes Question Bank

• Recall preparation of alkenes: (a) elimination of HX from a halogenoalkane by ethanolic NaOH and heat; (b) dehydration of an alcohol, by using a heated catalyst (e.g. Al2O3) or a conc. acid (e.g. conc. H2SO4); (c) cracking of a longer chain alkane