Chem 335 - Winter 1999 -
Organic Chemistry II (1 point each)
1. Which of the following could be dehydrohalogenated to give 2-butyne?
A 2,2,3,3-tetrabromobutane
B 2,2-dibromobutane
C 1,4-dibromobutane
D 1,2,3,4-tetrabromobutane
2. The product of addition of excess bromine to 2-butyne is
A 2,2,3,3-tetrabromobutane
B 2,2-dibromobutane
C 1,4-dibromobutane
D 1,2,3,4-tetrabromobutane
3. 1-Octyne could be prepared by SN2 reaction of sodium acetylide with
A 1-bromopentane
B 1-bromohexane
C 1-bromoheptane
D 1-bromooctane
4. Lindlar's catalyst is used to
A convert an alkyne to an alkane
B convert an alkyne to a cis-alkene
C convert an alkene to an alkyne
D oxidize an alkyne
5. When calcium carbide is added to water, a flammable gas
is formed.
The gas is
A carbon dioxide
B methane
C ethane
D acetylene