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CHAPTER 11
INTRODUCTION TO ORGANIC CHEMISTRY
MULTIPLE CHOICE QUESTIONS
11.1
E
The general formula for alkenes is:
A. CnH2n+2
B. C2nH2n
C. CnHn+2
D. CnH2n
E. CnH2n ─2
D. CnH2n+4
E. CnH2n ─4
Answer: D
11.2
E
The general formula of an alkane is:
A. CnH2n
B. CnH2n+2
C. CnH2n ─2
Answer: B
11.3
E
Which one of the following formulas is that of an unsaturated hydrocarbon?
A.
B.
C.
D.
E.
CH3 ─ CH2 ─ CH3
CH3 ─ CH = CH2
CH3 ─ CH2 ─ OH
CH3 ─ O ─ CH2 ─ CH3
CH3─ CH3
Answer: B
11.4
E
Which molecule represented below is unsaturated?
A. C3H8
B. CH3OH
C. C5H10
D. CH4
E. C4H10
Answer: C
11.5
E
The formula CH3CH2CH2CH2CH2CH = CH2 represents:
A. an alkane
E. a CFC
B. an alkyne
C. an alcohol
D. an unsaturated hydrocarbon
Answer: D
11.6
M
Which one of the following hydrocarbons does not have structural isomers?
A. C7H16
B. C6H14
Answer: E
C. C5H10
D. C4H8 E. C3H8
CHAPTER 11: ORGANIC CHEMISTRY
11.7
M
How many structural isomers are there of C4H10?
A. 4
B. 6
C. 2
D. 8
E. 10
Answer: C
11.8
E
Which of the following are structural isomers of hexane?
1.
2.
3.
4.
A. 1 and 2
Answer: D
B. 1 and 3
C. 2 and 3
D. 2 and 4
E. 3 and 4
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CHAPTER 11: ORGANIC CHEMISTRY
11.9
M
Which of the following pairs are geometric isomers?
A.
B.
C.
D.
CH3CH2 ─ O─ CH2CH3 and CH3CH2CH2CH2OH
Cl
|
CH3─ CH ─ CH─CH3 and ClCH2CH2CH2CH2Cl
|
Cl
Cl
|
CH3CH2C = CH and CH3 ─ C=C ─ CH2Cl
| |
|
Cl Cl
H
H
|
CH2Cl─ C = C─ H and CH2Cl ─ C = C─ H
| |
|
H CH2Cl
CH2Cl
Answer: D
11.10
E
The two molecules represented below are examples of
A. structural isomers B. isotopes
E. unsaturated hydrocarbons
C. alcohols
D. carboxylic acids
Answer: A
11.11
E
The two molecules represented below are examples of
CH3 ─ CH2 ─ O─ CH2CH3
A. isotopes. B. structural isomers.
E. unsaturated hydrocarbons.
CH3CH2CH2CH2 ─ OH
C. alcohols.
D. carboxylic acids.
Answer: B
11.12
E
Which of the following is an aromatic compound?
A. C2H2
B. C6H12
Answer: C
C. C6H4Br2
D. C5H10
E. C2H4Br2
CHAPTER 11: ORGANIC CHEMISTRY
11.13
E
The compound that has a triple bond between one pair of carbon atoms is
called a/an:
A. alkane
B. chlorofluorocarbon
C. alkyne
D. alkene
E. alcohol
Answer: C
11.14
E
The alkane with six carbon atoms is called
A. butane.
B. heptane.
C. hexane.
D. butene.
E. none of these
Answer: C
11.15
M
What is the systematic name for the compound represented below?
A.
B.
C.
D.
E.
2-ethylbutane
3-methylpentene
3-methyl-1-pentene
3-methyl-1-hexene
2-methylhexane
Answer: C
11.16
H
The systematic name for the compound represented below is
A.
B.
C.
D.
E.
4,5-diethylheptane
3-propyl-4-ethylhexane
3-ethyl-4-propylhexane
3-methyl-4-propylheptane
2-ethyl-4-propylhexane
Answer: D
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CHAPTER 11: ORGANIC CHEMISTRY
11.17
M
Which is the systematic name for the compound represented below?
A.
B.
C.
D.
E.
2,3-dibromopentane
1,2-dibromopentane
2,3-dibromopropane
1,2-dibromopropane
1,2-propane dibromide
Answer: D
11.18
M
The correct structure for 2,3,3-trimethylpentane is
CH3 CH3
|
|
A. CH3 ─CH ─ C ─ CH2CH3
|
CH3
CH3 CH3
|
|
B. CH3─C ─ CH─CH2CH3
|
CH3
C. CH3─ CH─ CH─ CH─ CH3
|
|
|
CH3 CH3 CH3
D. CH3─ CH─ CH─ CH2─ CH3
|
|
CH3 CH2 ─ CH3
Answer: A
11.19
M
The group of atoms that is responsible for the characteristic properties of a family
of organic compounds is called a/an ________ group.
A. hydrocarbon
Answer: B
B. functional
C. ether
D. enzyme
E. polyatomic ion
CHAPTER 11: ORGANIC CHEMISTRY
11.20
M
Organic compounds with the general formula R─ O─ R (where R is an alkyl group)
are called:
A. alkenes.
B. alcohols.
C. ethers.
D. aldehydes.
E. organic acids.
Answer: C
11.21
M
Which one of the following represents a carboxyl functional group?
A.
B.
C.
D.
E.
─OH
Answer: D
11.22
M
Which one of the following is the formula for a ketone?
A. CH3CHO
Answer: C
B. CH3OCH3
C. CH3COCH3
D. CH3COOH
E. HCºCH
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CHAPTER 11: ORGANIC CHEMISTRY
11.23
M
Which one of the following represents an ester functional group?
A
.
B.
C.
D.
Answer: B
11.24
M
Wood alcohol is the common name for
A. methanol.
B. ethanol.
C. propyl alcohol.
D. ethylene.
E. acetylene.
Answer: A
11.25
M
Which type of organic compound does not contain a carbonyl group?
A. ethers
B. carboxylic acids
C. ketones
D. aldehydes
E. esters
Answer: A
11.26
M
Acetylene, C2H2, the simplest alkyne, can be prepared from "inorganic" materials.
Which reaction below is used to prepare acetylene in this way?
A.
B.
C.
D.
2C + H2  C2H2
C2H4  C2H2 + H2
2CO + 2H2O  C2H2 + H2O2
CaC2 + 2H2O  C2H2 + Ca(OH)2
Answer: D
CHAPTER 11: ORGANIC CHEMISTRY
11.27
M
Which one of the following compounds will result from the addition of HCl to
CH3─ CH=CH2 ?
A.
B.
C.
D.
E.
CH3Cl + CH2= CH2
CH3─ CHCl=CH2
CH3─ CHCl─CH3
CH3─ CH2─CH2Cl
none of these
Answer: C
11.28
M
Which is the product of the reaction of one mole of HCl with one mole of
CH3─CH2─CCH?
A. CH3─CH2─CH=CHCl
B. CH3─CH=CH─CH2Cl
C. CH3─CH2─C=CH2
|
Cl
D. CH3─CH2Cl + CHCH
Answer: C
11.29
E
The reaction of an alcohol and a carboxylic acid yields
A. a hydrocarbon. B. an ester. C. an ether.
D. an aldehyde. E. a ketone.
Answer: B
11.30
E
The reaction of ethylene and water yields
A. an aldehyde.
B. an ester. C. an alcohol.
D. an ether. E. an organic acid.
Answer: C
11.31
M
Oxidation of the secondary alcohol CH3CH(OH)CH3 will produce a/an
A. aldehyde. B. amine.
C. alkene.
D. ketone. E. carboxylic acid.
Answer: D
11.32
M
Esters are made from two classes of organic compounds. They are
A. acids and bases. B. amines and alcohols. C. alcohols and acids.
D. amines and alkenes. E. alkenes and bases.
Answer: C
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CHAPTER 11: ORGANIC CHEMISTRY
11.33
M
Which choice gives the structures of the hydrolysis products of the following ester?
O
||
CH3CHCH2─ C─ OCH2CH3
|
CH3
A. CH3CH2 ─C─OH and CH3─ CHCH2OH
||
|
O
CH3
O
||
B. CH3CHCH2─ C─OH and CH3CH2OH
|
CH3
O
||
C. CH3CH─ CH2 ─ C─ OH and CH3OH
|
CH3
O
||
CH3CH─ CH2─ C─ Cl and CH3CH2OH
|
CH3
D.
Answer: B
11.34
M
The reaction of Cl2 with CH4 to produce methylchloride is an example of a/an
A.
B.
C.
D.
reaction involving radicals.
addition reaction.
reduction reaction.
ester hydrolysis.
Answer: A
11.35
E
What is the number of hydrogen atoms in the hydrocarbon pentane?
A. 5
B. 8
Answer: D
C. 10 D. 12
CHAPTER 11: ORGANIC CHEMISTRY
11.36
M
Isobutane differs from butane in that the former
A.
B.
C.
D.
E.
has a higher molecular weight.
has a different percentage composition.
is not a saturated hydrocarbon.
has a different empirical formula.
has a different structural formula.
Answer: E
11.37
E
An example of an organic acid is
A.
B.
C.
D.
Answer: B
11.38
M
Which functional group confers acidic properties upon an organic substance?
A.
–CHO
E.
–COOH
B. –CO
C. –CN D. –NH2
Answer: E
11.39
E
The group
is characteristic of
A.
aldehydes.
D.
esters.
B.
ketones.
E.
acids.
C.
alcohols.
Answer: A
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CHAPTER 11: ORGANIC CHEMISTRY
11.40
E
An amino acid must contain all of which of the following the elements?
A.
C, H, O
C.
C, H, N, O
B.
C, H, N
D.
C, H, O, N, S
Answer: C
11.41
M
Which has the highest boiling point?
A.
n–butane C4H10
B.
n–heptane C7H16
C.
n–hexane C6H14
D.
n–pentane C5H12
Answer: B
11.42
M
A product of a reaction between an alcohol and a carboxylic acid is
A.
an aldehyde.
C.
an ether.
B.
a ketone.
D.
an ester.
Answer: D
11.43
M
The reaction between acetic acid and ethyl alcohol
CH3COOH + C2 H5OH
 CH3COOC2 H5 + H2O
is classified as
A.
saponification.
C.
esterification.
B.
addition.
D.
hydrolysis.
Answer: C
CHAPTER 11: ORGANIC CHEMISTRY
11.44
M
The organic product of the chemical reaction shown below is :
H
H
H
Br2
+
FeBr3
catalyst
H
H
H
A.
B.
H
H
Br
H
H
H
H
Br
Br
Br
Br
H
H
H
H
H
C.
D.
H
H
H
H
Answer: C
Br
H
H
H
Br
H
H
Br
Br
Br
Br
Br
H
H
Br
H
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CHAPTER 11: ORGANIC CHEMISTRY
11.45
E
Which of the following compounds contains one chiral carbon atom?
A.
Cl O
|
||
CH3 ─ C ─ C ─ CH3
|
Cl
C.
Cl
|
CH3 ─ O ─ C ─ O ─ CH3
|
Br
E.
B.
Cl
|
CH3 ─ CH2 ─ CH ─ CH3
D.
O
||
CH3 ─ C ─ O ─ CH2 ─ CH3
O
||
CH3 ─ CH2 ─ C ─ H
Answer: B
11.46
E
Which of the following compounds contains one chiral carbon atom?
CH3
OH
CH3
|
|
|
CH3 ─ C ─ CH2 ─ CH2 ─ CH ─ CH2 ─ C ─ CH3
|
|
Cl
Cl
A.
H
B.
H
CH3
H
H
H
C.
CH3Cl
D.
O
||
CH3 ─ C ─ CH3
E.
O
||
CH3 ─ CH2 ─ C ─ OH
Answer: A
CHAPTER 11: ORGANIC CHEMISTRY
SHORT ANSWER QUESTIONS
11.47
M
Which of the following are structural isomers?
a.
CH3─ CH2─ CH2─ CH2 ─ CH3
b.
CH3 ─ CH ─ CH2─ CH3
|
CH3
c.
CH3 ─ CH ─ CH─ CH3
|
|
CH3 CH3
d.
CH3
|
CH3 ─ C ─ CH3
|
CH3
e
CH2 = CH ─ CH2 ─ CH2 ─ CH2 ─ CH3
Answer: a,b, and d
11.48
M
Write the formula for the alcohol and the carboxylic acid from which the following ester was prepared.
O
||
CH3 ─ (CH2)14 ─ C
|
O(CH2)9CH3
Myricyl palmitate (beeswax)
Answer: CH3─(CH2)14─COOH,
11.49
M
CH3─(CH2)9─ OH
Write the formula for the alcohol and the carboxylic acid from which the following ester was prepared.
O
||
CH3 ─ C
|
O ─ CH2 ─ CH3
Ethyl acetate (nail polish remover)
Answer: CH3─COOH,
CH3─CH2─OH
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CHAPTER 11: ORGANIC CHEMISTRY
11.50
M
Write the formula for the alcohol and the carboxylic acid from which the following ester was prepared.
O
||
CH3 ─CH2─ C
|
O─CH2─CH─CH3
|
CH3
Isobutyl propionate (rum flavor)
Answer: CH3─CH2─COOH,
11.51
E
Name the following compound:
Answer: 2,3 - dimethylbutane
11.52
E
Name the following compound:
Answer: 2,2 - dimethylbutane
CH3─CH─CH2─OH
|
CH3
CHAPTER 11: ORGANIC CHEMISTRY
TRUE-FALSE QUESTIONS
11.53
M
The systematic name for the hydrocarbon with the following structural formula is
1-ethyl-2-methylbutane.
CH2─CH3
|
CH3─CH2 ─ C─CH3
|
CH3
Answer: F
11.54
M
The systematic name for the compound with the following structural formula is
4,5-dimethyl-2-hexene.
CH3
|
CH3─CH─CH─CH3
|
CH=CH ─ CH3
Answer: T
11.55
M
The oxidation product of the alcohol CH3CH2CH2OH when using Cr2O72
oxidizing agent is:
─
as the
O
||
CH3─C─CH3
Answer: F
11.56
M
The reaction of HCl(g) with CH3─CH=CH2 will yield CH3CH2CH2Cl as the main
product.
Answer: F
11.57
M
11.58
E
Cycloalkanes have the general formula CnH2n.
Answer: T
Two substances that are non-superimposable mirror images of each other are called enantiomers.
Answer: T
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