84 Practice Problems for Chapter 21 – Chem 1C
1.
Name the following:
A)
B)
C)
D)
E)
2.
Name the following:
A)
B)
C)
D)
3.
isopropane
methylpentane
methylbutane
n-pentane
dodecane
n-heptane
2-methyl-2-ethylbutane
3,3-dimethylpentane
2,2-diethylpropane
Name the following:
A) 2,4-diethylpentane
B) 3,5-dimethylheptane
C) secondary ethylpentane
D) 2,3-dimethyl-2,3-diethylpropane
E) none of these
4.
In lecture, a professor named a molecule 2-ethyl-4-tert-butylpentane. A student pointed out that the name was
incorrect. What is the correct systematic name for the molecule?
A) 2-t-butyl-5-methylhexane
B) 2-ethyl-4,5,5-trimethylhexane
C) 3,5,6,6-tetramethylheptane
D) 2,2,3,5-tetramethylheptane
E)
undecane
5.
Structural isomers have
A) different molecular formulas and different structures.
B) different molecular formulas but the same structure.
C) the same molecular formula and the same structure.
D) the same molecular formula but different structures.
E)
none of these
6.
How many structural isomers does propane have?
A) 3
B) 2
C) 1
D) 5
E)
4
7.
The product of ethane undergoing dehydrogenation is called
A) propene.
B) methene.
C) ethene.
D) propane.
E)
none of these
8.
Which of the following, upon reacting with oxygen, would form the greatest amount of carbon dioxide?
A) n-pentane
B) isopentane
C) neopentane
D) Two of these would form equal amounts.
E)
All of these would form equal amounts.
9.
Which of the following has the lowest boiling point?
A) methane
B) butane
C) ethane
D) propane
E)
All of these have the same boiling point.
10.
Which of the following names is a correct one?
A) 3,4-dichloropentane
B) 1-chloro-2,4-methyl-3-ethylcyclohexane
C) 1,1-dimethyl-2,2-diethylpentane
D) cis-1,3-dimethylbutane
E)
2-bromo-1-chloro-4,4-diethyloctane
11.
What is the compound whose carbon skeleton (minus any hydrogen atoms) appears below?
A)
B)
C)
D)
E)
2,4-diethyl-3,6-dimethylheptane
2,5-dimethyl-4,6-diethylheptane
1,4-diethyl-3,6-dimethyl-tridecane
5-ethyl-3,4,6-trimethyloctane
4-ethyl-2,5,6-trimethyloctane
12.
The compound below is the carbon skeleton (minus any hydrogen atoms) of
I.
a C12H26
II.
a substituted octane
III.
a compound with 3 tertiary carbons
IV.
a compound with 3 secondary carbons
V.
a compound with 2 isopropyl groups
A)
B)
C)
D)
E)
13.
I, II, III
II, III, IV
III, IV, V
II, IV, V
I, II, III, IV
A student gave a molecule the following name:
3-methyl-4-isopropylpentane
However, the teacher pointed out that although the molecule could be correctly drawn from this name, the
name violates the IUPAC rules. What is the correct (IUPAC) name for the molecule?
A)
B)
C)
D)
E)
14.
4-isopropyl-3-methylpentane
2-isopropyl-3-methylpentane
1,1,2,3-tetramethylpentane
2,3,4-trimethylhexane
3,4-dimethylheptane
A student gave a molecule the following name:
2-ethyl-3-methyl-5-butylhexane
However, his TA pointed out that although the molecule could be correctly drawn from this name, the name
violates the systematic rules. What is the correct (IUPAC) name for the molecule?
A)
B)
C)
D)
E)
3,4-dimethyl-6-butylheptane
2-butyl-4,5-dimethylheptane
5,7,8-trimethyldecane
1,2-diethyl-3,6,7-trimethylnonane
3,4,6-trimethyldecane
15.
Name the following:
A)
B)
C)
D)
E)
2,2,3,5-tetramethyl-7-propyl-7-t-butyldecane
6-propyl-2,6-di-t-butylnonane
2,2,5,7,8,8-hexamethyl-3,3-dipropylnonane
isonanane
none of these
16.
How many isomers of C4H10 are there?
A) 3
B) 5
C) 4
D) 2
E)
6
17.
How many isomers are there with the formula C3H4? Include both structural and geometric isomers.
A) 3
B) 2
C) 5
D) 6
E)
4
18.
1-Propene undergoes hydrogenation. The product of this is
A) methane.
B) ethane.
C) propane.
D) 2-propane.
E)
none of these
19.
Which of the following is not a structural isomer of 1-pentene?
A) 2-pentene
B) 2-methyl-2-butene
C) cyclopentane
D) 3-methyl-1-butene
E)
1-methyl-cyclobutene
20.
Which of the following is an incorrect name?
A) trans-1,2-dichloroethene
B) butene
C) ethyne
D) cis-1,1-dichloropropane
E)
1,1-dichloropropane
21.
H2CCHCH2N(CH3)2 is
A) an alkyne and a secondary amine.
B) an alkene and a primary amine.
C) an alkene and a tertiary amine.
D) an alkyne and a tertiary amine.
E)
none of these
22.
Name the following:
A)
B)
C)
D)
E)
23.
Name the following:
A)
B)
C)
D)
E)
24.
1-hexyne
2-ethynyl butane
2-ethyl-3-butyne
3-methyl-1-pentyne
3-methyl-4-pentyne
2-chloro-3-chloro-cis-2-butene
2,3-dichloro-cis-2-butene
2,3-dichloro-trans-2-butene
1-chloro-1-methyl-2-chloro-propene
2,3-dichloro-1-methyl-propene
Name the following:
A) 1,1,1-trichloro-5-bromo-3-pentene
B) 5,5,5-trichloro-1-bromo-2-pentene
C) 1,1,1-trichloro-5-bromo-2-pentene
D) 1,1,1-trichloro-5-bromo-3-pentyne
E) none of these
25.
How many structural and geometric isomers are there of chloropropene?
A) 2
B) 3
C) 4
D) 5
E)
more than 5
26.
Consider the molecule trans-2-butene. Which statement is true?
A) The molecule has two  bonds.
B) There is free rotation around every bond in the molecule.
C) Cis-2-butene is its structural isomer.
D) Carbon #2 exhibits sp2 hybridization.
E)
None of these
27. Which of the following compounds can exhibit geometric isomerism?
A)
B)
C)
D)
E)
28.
Consider the following four compounds:
Which of these compounds would have the same physical properties (melting point, boiling point, density, and
so on)?
29.
A)
B)
C)
D)
I and II
I and III
II and III
III and IV
E)
I and IV
Which of the following types of compounds lacks an sp2-hybridized carbon center?
A) aldehydes
B) ketones
C) alcohols
D) alkenes
30.
For which of the following compound(s) are cis and trans isomers possible?
A) 3,4-diethyl-3-hexene
B) 2,3-dichloro-2-butene
C) 2,2-dimethylcyclohexanol
D) ortho-chloroanaline
E)
dibromoethyne
31.
How many different possible tetramethylbenzenes exist?
A) 2
B) 3
C) 4
D) 5
E)
6
32.
Which of the following have a -C-O-C- functional group?
A) esters
B) ethers
C) amines
D) aldehydes
E)
alcohols
33.
The common name for 2-propanol is
A) n-propyl alcohol.
B) ethanol.
C) methanol.
D) isopropyl alcohol.
E)
none of these
34.
The oxidation of secondary alcohols results in
A) ketones.
B) secondary alcohols.
C) aldehydes.
D) esters.
E)
ethers.
35.
In which of the following lists do all members have a C=O bond?
A) ester, aldehyde, secondary alcohol, ketone
B) any alcohol, ether, ester
C) secondary alcohol, ketone, aldehyde
D) ester, aldehyde, ketone
E)
carboxylic acid, ether, tertiary alcohol
36.
Identify the type of organic compound shown:
(CH3)2CHNH2
A)
B)
C)
D)
E)
37.
primary alcohol
primary amine
tertiary amine
carboxylic acid
ether
Name the following:
A)
B)
C)
D)
E)
38.
Name the following:
A)
B)
C)
D)
E)
39.
acetone
butyraldehyde
diethylketone
diethyl ether
none of these
Name the following:
A)
B)
C)
D)
E)
41.
methyl alcohol
ethyl alcohol
propyl alcohol
isopropyl alcohol
butanol
Name the following:
A)
B)
C)
D)
E)
40.
n-propyl acetate
isopropyl formate
isopropyl acetate
ethyl propanoate
none of these
2-chloro-3-ethyl-1-isopropylbutanone
isopropyl-chloro,methylbutyl ketone
2-butyl,chloro,isobutanoyl methane
4-chloro-2,5-dimethyl-3-heptanone
3-methyl-4-chloro-1-isopropylpentanone
Identify the type of organic compound shown:
A)
B)
C)
D)
E)
aldehyde
ester
amine
ketone
none of these
42.
Identify the type of organic compound shown:
A)
B)
C)
D)
E)
43.
Classify the following molecule:
A)
B)
C)
D)
E)
44.
NH2OH
(CH3)2NCH2CH3
Classify the following molecule:
A)
B)
C)
D)
E)
46.
primary alcohol
secondary alcohol
tertiary alcohol
ether
phenol
Identify the secondary amine.
A) CH3CH2NH2
B) CH3NHCH2CH3
C)
D)
E)
45.
aldehyde
ester
amine
ketone
none of these
primary amine
secondary amine
tertiary amine
amino acid
peptide
Classify the following molecule:
A)
B)
C)
D)
E)
acid
aldehyde
amine
ketone
carbonyl
47.
Which of the following will yield a carboxylic acid upon oxidation?
A) a secondary alcohol
B) an aldehyde
C) a cycloalkane
D) a ketone
E)
tertiary alcohol
48.
If you were to heat pentanoic acid and 2-butanol with an acid catalyst, which of the following would you be
most likely discover in your flask?
A) a ketone
B) an ester
C) an amine
D) an alkane
E)
an aldehyde
49.
Classify the following molecule:
A)
B)
C)
D)
E)
50.
51.
acid
aldehyde
amine
ketone
carbonyl
Oxidation of 2-methyl-1-butanol could yield
I.
2-methyl-1-butanone
II.
2-methylbutanal
III.
2-methylbutanoic acid
A)
B)
C)
D)
E)
I only
II only
III only
II and III
I and III
Refer to the following structures. Which of the statements below is true of them?
A)
B)
C)
D)
E)
52.
I and II have different molecular formulas.
I and III are structural isomers of each other.
II and III are stereoisomers of each other.
II and III are different conformations of the same compound.
I and III are the same compound.
Which structure represents an optically active aldehyde?
A)
B)
C)
D)
E)
53.
Pick the optically active molecule among the following:
A)
B)
C)
D)
E)
none of these
54.
Which of the following molecules exhibits chirality?
A) CH4
B) CH3OH
C) CH3CH2OH
D)
E)
CH3CClFOH
55.
Which of the following is optically active (that is, chiral)?
A) diethylamine
B) difluoromethane
C) 2-bromopropane
D) 2-chloropentane
E)
1-chlorohexane
56.
Which of the following yields a primary alcohol upon reduction?
A) a ketone
B) an alkene
C) an amine
D) an aldehyde
E)
an ether
57.
When C4H8 is treated with water and H2SO4, a tertiary alcohol is produced. Which of the following structures
could represent C4H8 in this reaction?
A) CH3CH = CHCH3
B) CH3CH2CH = CH2
C)
D)
E)
CH3CH2CH2CH3
none of these
58.
Oxidation of a primary alcohol results in a(n) __________, and oxidation of a secondary alcohol results in
a(n) _________.
A) carboxylic acid, amine
B) aldehyde, ketone
C) ester, ether
D) ketone, aldehyde
E)
amine, carboxylic acid
59.
The boiling point of methanol is much higher than that of ethane. This is primarily due to
A) the difference between the molar mass of methanol and that of ethane.
B) the hydrogen bonding in methanol.
C) the significant molecular size difference between methanol and ethane.
D) the carbon-oxygen double bond in the methanol.
E)
none of these
60.
Teflon is an example of a
A) copolymer.
B) homopolymer.
C) dimer.
D) two of these
E)
none of these
61.
No atoms are lost from starting material in making which kind of polymer?
A) condensation polymer
B) polyester polymer
C) addition polymer
D) vulcanized polymer
E)
branched polymer
62.
The structures of proteins are partially determined by the order of various amino acids in the macromolecule.
This level of structural determination is known as
A) primary structure.
B) secondary structure.
C) tertiary structure.
D) quaternary structure.
E)
the order of bases.
63.
A polypeptide is
A) an addition polymer of amino acids.
B) a condensation polymer of amino acids.
C) a polymer of sugar molecules.
D) a part of nucleic acids.
E)
none of these
64.
Which of the following is the best description of a protein?
A) an alternating chain of amino acids and nucleic acids
B) a chain of amino acids connected by ester bonds
C) two antiparallel chains of nucleic acids connected by hydrogen bonding
D) a chain of amino acids formed by condensation polymerization
E)
a chain of nucleotides connected by phosphodiester bonds
65.
A protein is
A) a polysaccharide.
B) a saturated ester of glycerol.
C) one of the units composing a nucleic acid.
D) a polymer of amino acid units.
E)
an aromatic hydrocarbon with a fused ring structure.
66.
The condensation product of two amino acids is a(n)
A) peptide.
B) ketone.
C) ether.
D) ester.
E)
alcohol.
67.
An example of a secondary structure of a protein is
A) an alpha amino acid.
B) a peptide linkage.
C) a pleated sheet.
D) serine.
E)
none of these
68.
Hydrogen bonding between –C=O groups and NH– groups in the backbone of a protein determines the
A) primary structure.
B) secondary structure.
C) tertiary structure.
D) quaternary structure.
E)
all of these
69.
The overall shape of a protein is maintained by
A) hydrogen bonding.
B) ionic bonds.
C) dipole-dipole bonding.
D) covalent bonds.
E)
all of these
70.
The analysis of a protein for its amino acid content is valuable in determining the protein's
A) tertiary structure.
B) secondary structure.
C) quaternary structure.
D) primary structure.
71.
The alpha helix of a protein is held in a coiled conformation partly because of
A) hydrogen bonding.
B) optical activity.
C) active sites.
D) double bonding.
72.
What are the building blocks of proteins?
A) nucleotides
B) glucose and sucrose
C) lipids
D) amino acids
73.
Which of the following is not a carbohydrate?
A) ribose
B) asparagine
C) glycogen
D) starch
E)
fructose
74.
Which of the following is a carbohydrate reservoir for animals?
A) starch
B) cellulose
C) glycogen
D) two of these
E)
none of these
75.
What is the complementary nucleic acid sequence for the DNA sequence GAC TAC GTT AGC?
A) GAC TAC GTT AGC
B) TCA GCA TGG CTA
C) CGA ATG CAT CAG
D) CTG ATG CAA TCG
E)
GCG AAA GGG TTA
76.
Which one of the following statements about the structure of proteins is incorrect?
A) Disulfide bonds provide strong intrachain interactions.
B) Hydrogen bonding stabilizes the -helix proteins.
C) Nonpolar groups tend to face the outside of a protein in an aqueous solution.
D) Ionized amino acid side chains can form salt bridges within a protein.
E)
Heat can disrupt tertiary structure.
77.
Which of the following pairs of substances could form a polyester?
A) H2C=CHCH3 + CH3CH2CH2COOH
B) HOOC(CH2)2COOH + H2NCH2CH=CHCH3
C) H2C=CH2 + H2C=CHCH3
D) HOCH2CH2OH + HOOCCOOH
E)
H2NCH2COOH + H2NCOCH2CH2COOH
78.
Consider the polymer drawn below:
What monomer(s) is (are) needed to produce the above polymer?
A)
B)
C)
D)
E)
79.
CH2 = CH2 and CH3CH = CH2
CH2 = C(CH3)2
CH3CH = CHCH3
CO and CH2 = CH2
none of the above
What is added to form the polymer below?
n
A)
B)
C)
D)
E)
CH2 = CH – CH3
CH3CH2CH3
CH3 – CH = CH – CH3
H2C = CH – CH – CH2
CH3CH = C(CH3)2
80.
Which of the following pairs of substances could form an addition copolymer?
A) HOOCCH2OCH2COOH + HOCH2CH2OH
B) HO(CH2)4COOH + HOCH2CH2CH2NH2
C) H2C=CHCH=CH2 + H2CCH=CHCH3
D) HOCH2CH2OH + HOOCCH2COOH
E)
H2NCH2COOH + H2NCOCH2CH2COOH
81.
The structure of the polymer used in a freezer wrap can be described mainly as follows:
[CCl2 CH2 CCl2  CH2  CCl2  CH2  CCl2  CH2]n
The chief monomer of this wrap would have which structure?
A)
B)
C)
D)
E)
82.
Indicate which of the following monomers is(are) used to produce the polymer
A)
B)
C)
D)
E)
83.
CCl2 = CH2
Cl2C – CH2
Cl2C = CH2 = CCl2
CCl2
none of these
I only
II only
III only
I and III
II and III
The formula below is the repeating unit of a
A)
B)
C)
D)
E)
homo-polymer formed by an addition reaction.
homo-polymer formed by a condensation reaction.
co-polymer formed by an addition reaction.
co-polymer formed by a condensation reaction.
polyester formed by an addition reaction.
84.
What monomer(s) is(are) needed to make the polymer shown here?
I.
HOCH2CH2OH
II.
HOOCCH2CH2COOH
III.
HOCH2CH2COOH
IV.
HOCH = CHOH
V.
HOOCCH = CHCOOH
A)
B)
C)
D)
E)
II only
III only
I and II
IV and V
II and III
Answer Key
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
C
C
B
D
D
C
C
E
A
E
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
E
A
D
E
A
D
A
C
E
D
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
C
D
C
E
E
D
B
C
C
B
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
B
B
D
A
D
B
C
D
D
D
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
B
A
C
B
A
B
B
B
D
D
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
E
B
C
E
D
D
C
B
B
B
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
C
A
B
D
D
A
C
B
E
D
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
A
D
B
C
D
C
D
B
C
C
81.
82.
83.
84.
A
B
D
C