Application Questions - 22 Alkenes

1. An alkene on treating with hot acidified KMnO4 gives 4-oxopentanoic acid. The alkene is
(a) pentene
(b) 2-pentene
(c) 1-methylcyclobutene
(d) 1,2-dimethylcyclopropene

2. The addition of Br2 to trans-2-butene produces
(a) (+)-2,3-dibromobutane
(b) (-)-2,3-dibromobutane
(c) rac-2,3-dibromobutane
(d) meso-2,3-dibromobutane

3. The treatment of propene with Cl-2 at 500-600 °C produces
(a) 1,2-dichloropropane
(b) allyl chloride
(c) 2,3-dichloropropene
(d) 1,3-dichloropropene

4. The electrophilic addition of 1,3-butadiene produces
(a) 1,2-addition product only
(b) 1,4-addition product
(c) both 1,2- and 1,4- addition products which are not at equilibrium with each other
(d) both 1,2- and 1,4-addition products which are at equilibrium with each other