Name: __________________________ Date: _____________

Practice Test - Unsaturated Hydrocarbons

1.
An unknown compound has the molecular formula C6H12. This compound may be a(n):
I alkane
II alkene
III cycloalkane
A.
I only
B.
II and III only
C.
I and III only
D.
I, II, and III


2.
The bond angles around an sp3 -hybridized carbon are ______ degrees.
A.
109.5
B.
120
C.
180.5
D.
60


3.
The bond angles around an sp2- hybridized carbon are ______ degrees.
A.
109.5
B.
120
C.
180.5
D.
60


4.
The IUPAC name for this compound is:
CH3CH=C(CH3)CH2CH3
A.
3-methyl-2-pentane
B.
3-methyl-3-pentane
C.
3-methyl-2-pentene
D.
3-methyl-3-pentene


5.
The IUPAC name for this compound is:
(CH3)2C=C(CH3)CH(CH3)CH2CH3
A.
3,4-dimethyl-2-pentene
B.
2,3,4-trimethyl-1-pentene
C.
2,3,4-trimethyl-2-hexene
D.
3,4,5-trimethyl-4-hexene


6.
The IUPAC name for this compound is:
(CH3)2C=C(CH2CH3)CH(CH3)CH2CH3
A.
3-ethyl-4-methyl-2-hexene
B.
3-ethyl-2,4-dimethyl-2-hexene
C.
2,3,4-trimethyl-2-hexene
D.
4-ethyl-3,5-dimethyl-4-hexene


7.
The reaction of 2-butene with chlorine yields:
A.
2-chlorobutane
B.
2-chlorobutene
C.
2,3-dichlorobutane
D.
2,3-dichlorobutene


8.
The reaction of water with 2-methyl-2-butene in the presence of an acid catalyst yields mainly:
A.
2-butanol
B.
2-methyl-2-butanol
C.
2-methyl-3-butanol
D.
2,3-dihydroxy-2-methylbutane


9.
The principal product(s) resulting from the addition of HCl to 2-butene is(are):
A.
2,3-dichlorobutane
B.
2-chlorobutene
C.
2-chlorobutane
D.
2-chlorobutane and 3-chlorobutane


10.
The principal product resulting from the addition of HCl to 2-methyl-2-butene is:
A.
2-chloro-2-methylbutane
B.
2-chloro-3-methylbutane
C.
3-chloro 2-methylbutene
D.
3-chloro-3-methylbutane


11.
The addition of bromine to this compound forms mainly:
 
CH3CH(CH3)CH=C(CH3)CH2CH3
 
A.
B.
C.
D.


12.
The addition of water to this compound in the presence of an acid catalyst forms mainly:
 
CH3CH(CH3)CH=CHCH2CH3
    I

    II

    III

    IV
A.
I and III only
B.
II and IV only
C.
II and III only
D.
I and IV only


13.
The product after addition of hydrogen chloride to this compound is:
 
CH3CH(CH3)CH=CHCH2CH3
 
A.
B.
mixture of two products:
C.
D.
mostly


14.
An unknown compound may be heptane, methylcyclohexane, or 2-heptene. If the red color of bromine does not disappear as the bromine solution is added to the unknown, then the unknown:
A.
must be heptane
B.
must be methylcyclohexane
C.
must be 2-heptene
D.
could be heptane or methylcyclohexane


15.
An unknown may be 2-hexene, cyclopentane, or hexane. When orange potassium dichromate is added to the unknown, the mixture develops a greenish color. The unknown:
A.
must be 2-hexene
B.
must be cyclopentane
C.
must be hexane
D.
may be cyclopentane or hexane


16.
The correct name of this compound is:
A.
4-ethyl-1-pentyne
B.
2-ethyl-4-pentyne
C.
4-methyl-1-hexyne
D.
3-methyl-5-hexyne


17.
The name of this compound is:
A.
5-propyl-2-heptyne
B.
3-propyl-5-heptyne
C.
4-ethyl-6-octyne
D.
5-ethyl-2-octyne


18.
A student incorrectly named a compound 2,3-dimethyl-6-ethyl-4-heptyne. The correct name for the compound is:
A.
2-ethyl-5,6-dimethyl-3-heptyne
B.
3,6,7-trimethyl-4-octyne
C.
2,3,6-trimethyl-4-octyne
D.
1,1,2,5-tetramethyl-3-heptyne


19.
The IUPAC name for this compound is:
A.
4-bromo-benzylmethane
B.
4-bromotoluene
C.
o-bromo-p-methylbenzene
D.
p-bromophenol


20.
The IUPAC name for this compound is:
A.
4-bromobenzyl alcohol
B.
4-bromophenol
C.
o-bromo-p-hydroxybenzene
D.
m-bromotoluene


21.
The product of the reaction of benzene with HBr is:
A.
m-dibromobenzene only
B.
p-dibromobenzene only
C.
a mixture of o-dibromobenzene and p-dibromobenzene
D.
There is no product: Benzene does not react with HBr


22.
The monosubstituted product of the reaction of benzene with bromine in the presence of a metal bromide is:
A.
bromobenzene
B.
m-dibromobenzene
C.
p-dibromobenzene
D.
o-dibromobenzene


23.
A student incorrectly named a compound 4-ethyl-1-pentene. The IUPAC name for the compound is:
A.
2-ethyl-4-pentene
B.
3-methyl-5-hexene
C.
4-methyl-1-hexene
D.
4-methyl-1-heptene


24.
A student incorrectly named a compound 4-butyl-1-methyl-2-hexene. The IUPAC name for the compound is:
A.
5-butyl-3-heptene
B.
1-methyl-2-octene
C.
4-ethyl-1-methyl-2-octene
D.
5-ethyl-3-nonene


25.
What is the major product when HI reacts with CH3CH=CH2?
A.
CH3CHICH3
B.
CH3CH2CH2I
C.
equal amounts of CH3CHICH3 and CH3CH2CH2I
D.
CH3CHICH2I


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