For each of the following, choose the best answer (give the letter).
(i) Which one has the smaller heat of hydrogenation: (a) 1-methylcyclohexene or (b) 3-methylcyclohexene?
(ii) Which one has the larger heat of combustion: (a) (E)-cyclononene or (b) (Z)-cyclononene?
(iii) Which one is a concerted reaction: (a) acid-catalyzed dehydration of an alcohol; (b) reaction of a tertiary alkyl chloride
with potassium tert-butoxide; or (c) addition of Cl 2 to an alkene?
(iv) Which one is thermodynamically more stable: (a) isobutyl radical or (b) tert-butyl radical?
(v) Which one is the rate law for an E2 reaction of an alkyl halide: (a) rate = k[RX] or (b) rate = k[RX][base]?
(vi) The major product of the reaction of methylcyclopentane with Br 2 in the presence of heat and light is which of
the following type of alkyl bromide: (a) primary; (b) secondary; or (c) tertiary?
(vii) The major product of the reaction of 1-pentene with HBr in the presence of peroxides and heat is formed via which of
the following: (a) a secondary carbocation; (b) a secondary radical; or (c) a secondary carbanion?
(viii) Stereoisomers that are not mirror images of each other and are not superimposable are:
(a) diastereomers; (b) enantiomers; (c) conformers; (d) polymers.