Chapter 24 Organic Chemistry
Student: ___________________________________________________________________________
1.
The general formula for alkenes is
A.
B.
C.
D.
E.
2.
The general formula of an alkane is
A.
B.
C.
D.
E.
3.
CnH2n+2
C2nH2n
CnHn+2
CnH2n
CnH2n-2
CnH2n
CnH2n+2
CnH2n-2
CnH2n+4
CnH2n-4
Which one of these formulas is that of an unsaturated hydrocarbon?
A.
B.
C.
D.
E.
4.
Which of these molecules is unsaturated?
A.
B.
C.
D.
E.
5.
C3H8
CH3OH
C5H10
CH4
C4H10
The formula
A.
B.
C.
D.
E.
an alkane.
an alkyne.
an alcohol.
an unsaturated hydrocarbon.
a CFC.
represents
6.
Which one of these hydrocarbons does not have isomers?
A.
B.
C.
D.
E.
7.
How many structural isomers are there of C4H10?
A.
B.
C.
D.
E.
8.
4
6
2
8
10
Which of these species are structural isomers of C6H14?
A.
B.
C.
D.
E.
9.
C7H16
C6H14
C5H10
C4H8
C3H8
I and II
I and III
II and III
II and IV
III and IV
Which of these pairs are geometric isomers?
A.
B.
C.
D.
10. The two molecules represented below are examples of
A.
B.
C.
D.
E.
isomers
isotopes
alcohols
carboxylic acids
unsaturated hydrocarbons
11. The two molecules represented below are examples of
A.
B.
C.
D.
E.
geometric isomers.
structural isomers.
optical isomers.
stereoisomers.
none of these
12. Which of these species is an aromatic compound?
A.
B.
C.
D.
E.
C2H2
C6H12
C6H4Br2
C5H10
C2H4Br2
13. The octane rating of gasoline refers to its
A.
B.
C.
D.
E.
percentage C8H18 by volume.
radiation dose.
alcohol level.
ability to resist engine knocking.
percentage of unsaturated hydrocarbons.
14. Which one of these hydrocarbon chains would have the highest octane rating?
A.
B.
C.
D.
15. The compound that has a triple bond between one pair of carbon atoms is called a/an
A.
B.
C.
D.
E.
alkane.
chlorofluorocarbon.
alkyne.
alkene.
alcohol.
16. The alkane with six carbon atoms is called
A.
B.
C.
D.
E.
butane.
hexane.
heptane.
butene.
none of these.
17. Which of these 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
18. 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.
19. Which of these 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-propane dibromide
1,2-dibromopropane
20. The correct structure for 2,3,3-trimethylpentane is
A.
B.
C.
D.
21. The group of atoms that is responsible for the characteristic properties of a family of organic compounds is
called a/an ________ group.
A.
B.
C.
D.
E.
hydrocarbon
functional
ether
enzyme
polyatomic ion
22. Organic compounds with the general formula R-O-R (where R is an alkyl group) are called
A.
B.
C.
D.
E.
alkenes.
alcohols.
ethers.
aldehydes.
organic acids.
23. Which one of these structures represents a carboxyl functional group
A.
B.
C.
D.
E.
24. Which one of these structures represents an ester functional group?
A.
B.
C.
D.
25. Which one of these choices is the formula for a ketone?
A.
B.
C.
D.
E.
CH3CHO
CH3OCH3
CH3COCH3
CH3COOH
26. "Wood alcohol" is the common name for
A.
B.
C.
D.
E.
methanol.
ethanol.
propyl alcohol.
ethylene.
acetylene.
27. The name for the compound with the formula CH3CH2CH2CH2OH is
A.
B.
C.
D.
E.
propanol.
propane.
butanol.
pentane.
pentanol.
28. Which type of organic compound does not contain a carbonyl group?
A.
B.
C.
D.
E.
ethers
carboxylic acids
ketones
aldehydes
esters
29. Acetylene, C2H2, the simplest alkyne, can be prepared from "inorganic" materials. Which of these
reactions 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
30. Which one of these compounds will result from the addition of HCl to
A.
B.
C.
D.
E.
none of these
31. Which is the product of the reaction of one mole of HCl with one mole of 1-butyne?
A.
B.
C.
D.
1-chloro-1-butene
1-chloro-2-butene
2-chloro-1-butene
ethyl chloride + acetylene
32. The reaction of an alcohol and a carboxylic acid yields
A.
B.
C.
D.
E.
a hydrocarbon.
an ester.
an ether.
an aldehyde.
a ketone.
?
33. The reaction of ethylene and water yields
A.
B.
C.
D.
E.
an aldehyde.
an ester.
an alcohol.
an ether.
an organic acid.
34. Oxidation of the 2-propanol will produce a/an
A.
B.
C.
D.
E.
aldehyde.
amine.
alkene.
ketone.
carboxylic acid.
35. Esters are synthesized from two classes of organic compounds. Those two types of compounds are
A.
B.
C.
D.
E.
acids and bases.
amines and alcohols.
alcohols and acids.
amines and alkenes.
alkenes and bases.
36. Which choice gives the structures of the reaction products when the ester below is hydrolyzed in acid
solution?
A.
B.
C.
D.
37. The reaction of Cl2 with CH4 to produce methyl chloride is an example of a/an
A.
B.
C.
D.
E.
free radical reaction.
addition reaction.
reduction reaction.
ester hydrolysis.
polymerization.
38. Which of these statements describes a condensation reaction?
A.
B.
C.
D.
E.
addition of H2O to a double bond
linking an acid and an alcohol to make an ester and water
addition of H2 to an alkene
oxidation of ethanol to acetaldehyde
hydrolysis of an ester
39. Bromination of benzene (C6H6), an aromatic compound,
A.
B.
C.
D.
E.
occurs by substitution rather than addition.
occurs by addition rather than substitution.
occurs more rapidly than bromination of a nonaromatic compound.
results in formation of 1,2,3,4,5,6-hexabromocyclohexane.
occurs in the absence of a catalyst.
40. Amines are
A.
B.
C.
D.
E.
organic bases that react with water to produce ammonia.
organic acids that react with water to produce ammonia.
organic bases that react with acids to form ammonium salts.
organic acids that react with bases to form ammonium salts.
none of these.
41. Which of these reactions leads to a change in the hybridization of one or more carbon atoms?
A.
B.
C.
D.
E.
free radical halogenation of an alkane
hydrolysis of an ester to yield an acid and an alcohol
substitution of an aromatic ring using a halogen
oxidation of an alcohol to yield a carboxylic acid
neutralization of an amine using a strong mineral acid
42. Which functional group, when present in a compound that is allowed to stand in air, poses a danger of
slowly yielding explosive peroxides?
A.
B.
C.
D.
E.
ether
alcohol
carboxylic acid
ketone
unsaturated hydrocarbon
43. Which of the following compounds are isomers?
I. pentane
II. 2-methylbutane
III. 2,3-dimethylbutane
IV. 2,2-dimethylpropane
V. 1-hexene
44. Write the formula for the alcohol and the carboxylic acid from which the following ester may be
synthesized.
45. Write the formula for the alcohol and the carboxylic acid from which the following ester may be
synthesized.
46. Write the formula for the alcohol and the carboxylic acid from which the following ester may be
synthesized.
47. Name the following compound:
48. Name the following compound:
49. The systematic name for the hydrocarbon with the following structural formula is 1-ethyl-2-methylbutane.
True False
50. The systematic name for the compound with the following structural formula is 4,5-dimethyl-2-hexene.
True False
51. The oxidation product of 1-propanol when using Cr2O72- as the oxidizing agent is acetone.
True False
52. The reaction of hydrogen chloride gas with propene will yield 1-chloropropane as the main product.
True False
53. Cycloalkanes have the general formula CnH2n.
True False
Chapter 24 Organic Chemistry Key
1.D
2.B
3.B
4.C
5.D
6.E
7.C
8.D
9.D
10.A
11.B
12.C
13.D
14.A
15.C
16.B
17.C
18.D
19.E
20.A
21.B
22.C
23.D
24.B
25.C
26.A
27.C
28.A
29.D
30.C
31.C
32.B
33.C
34.D
35.C
36.B
37.A
38.B
39.A
40.C
41.D
42.A
43.I, II, and IV
44.
45.
46.
47. 2,2-dimethylbutane
48. 2,3-dimethylbutane
49.FALSE
50.TRUE
51.FALSE
52.FALSE
53.TRUE
1. Carbon forms so many more compounds than other elements because ____.
A) carbon atoms can form more than four bonds
B) carbon forms strong ionic bonds with many metals
C) carbon atoms link up with each other to form chains and rings
D) all carbon compounds are thermodynamically very stable
2. An example of an aromatic compound is _____.
A) cyclohexane
B) naphthalene
C) neopentane
D) propane
3. Which of the following compounds is not aromatic?
A) benzene
B) anthracene
C) naphthalene
D) ethene
4. An example of a saturated compound is _____.
A) propane
B) propylene
C) butyne
D) isobutylene
5. Alkenes exhibit geometrical isomerism due to C = C _____.
A) free rotation
B) restricted rotation
C) free vibration
D) restricted vibration
6. Geometrical isomerism is exhibited by ______.
A) paraffins
B) alkenes
C) alkanes
D) alkynes
7. Alkanes do not undergo _____ reactions.
A) substitution
B) combustion
C) addition
D) any of the above
8. A chiral carbon atom is not _____.
A) unsymmetric
B) symmetric
C) dissymmetric
D) asymmetric
9. An achiral carbon atom is _____.
A) unsymmetric
B) asymmetric
C) dissymmetric
D) symmetric
10. An example of a chiral alkane is _____.
A) isobutane
B) 3-methylhexane
C) n-butane
D) 3-methylpentane
11. An example of an achiral alkane is _____.
A) 3-methylhexane
B) 3-methylheptane
C) 3-methylpentane
D) 4-methyloctane
12. The number of different monochloro pentanes that can be produced by the chlorination
of n-pentane is _____.
A) four
B) three
C) two
D) five
13. The hydrocarbon formula C4H8 has a total of _____ possible isomers.
A) three
B) five
C) four
D) six
14. The compound C3H5Br will have _____ possible isomers.
A) four
B) three
C) two
D) five
15. The hydrocarbon having the lowest boiling point among the following is _____.
A) n-pentane
B) neopentane
C) isopentane
D) 2-methylbutane
16. The hydrocarbon C4H6 can be an/a _____.
A) alkene
B) alkyne
C) cycloalkene
D) all of the above
17. The hydrocarbon C5H12 can be _____.
A) only an alkane
B) only an alkyne
C) only an alkene
D) a cycloalkane
18. The most unstable hydrocarbon among the following is _____.
A) cyclopentane
B) neopentane
C) cyclobutadiene
D) ethane
19. An alkane can be differentiated from an alkene using _____.
A) Br2/CCl4
B) NaOH
C) CH3COOH
D) FeCl3
20. Acetylene can polymerize to yield _____.
A) polyacetylene
B) polyethene
C) benzene
D) toluene
21. Which of the following can yield two different isomers on reaction with HBr?
A) 1-butene
B) 2-butene
C) pentane
D) ethene
22. 1,2-dichloropropane exhibits _____ isomerism.
A) no
B) optical
C) cis-trans
D) tanto
23. Which of the following molecules has a chiral carbon atom? _____
A) CH3CH(NH2)COOH
B) CH2(NH2)COOH
C) CH2(OH)CH2(OH)
D) CH3COOH
24. Which of the following exhibits geometrical isomerism?
A) 2-pentene
B) 1-pentene
C) pentane
D) 1-butene
25. Which of the following undergoes addition reactions?
A) butane
B) benzene
C) naphthalene
D) acetylene
26. Which among the following is not a planar molecule?
A) cyclohexane
B) benzene
C) ethylene
D) acetylene
27. Mesitylene is _____.
A) 1,4-dimethylbenzene
B) 1,2-dimethylbenzene
C) 1,3,5-trimethylbenzene
D) 1,2,3-trimethylbenzene
28. Which of the following is not considered a functional group?
A) –CHO
B) –COOH
C) –H
D) –OH
29. A Lewis base among the following is _____.
A) diethyl ether
B) butane
C) cyclohexane
D) neopentane
30. Which compound class is basic in nature?
A) ketones
B) aldehydes
C) amines
D) phenols
31. Which of the following molecular formulas cannot represent an ether?
A) CH4O
B) C2H6O
C) C3H8O
D) C4H10O
32. A carbon–oxygen double bond is not present in the _____ functional group.
A) ester
B) ether
C) amine
D) acid
33. Compounds which can be easily oxidized are _____.
A) carboxylic acids
B) phenols
C) amides
D) aldehydes
34. Methyl formate is a/an _____.
A) ester
B) ketone
C) ether
D) aldehyde
35. An ester can be produced by the reaction of _____.
A) a carboxylic acid and a base
B) a carboxylic acid and an alcohol
C) a carboxylic acid and an amine
D) an aldehyde and an alcohol
36. Which one of the following saturated compounds can have geometric isomers?
A) 1,1-dichlorocyclopropane
B) 1,2-dichlorocyclopropane
C) 1,2-dichloropropane
D) 1,3-dichloropropane
37. On oxidation, the compound C4H10O yields a ketone. The original compound could be
_____.
A) n-butanol
B) isobutyl alcohol
C) secondary butyl alcohol
D) tertiary butyl alcohol
38. Ketones can be obtained by the oxidation of _____.
A) tertiary alcohols
B) primary alcohols
C) secondary alcohols
D) aldehydes
39. The compound C4H10O does not react with sodium metal . On chlorination ithe
compound produces three different monochloro isomers. The compound could be
_____.
A) isobutyl alcohol
B) diethyl ether
C) methyl n-propyl ether
D) methyl isopropyl ether
40. Which class of compounds will not react with sodium metal?
A) acids
B) alcohols
C) aldehydes
D) phenols
41. Ethyl methanoate is a/an _____.
A) ether
B) ester
C) anhydride
D) acid
42. What is a commercial use for naphthalene?
A) mothballs
B) automotive antifreeze
C) as a welding gas
D) as an anesthetic gas
43. HBr will react with _____.
A) ethyne
B) naphthalene
C) ethane
D) benzene
44. The functional group not containing oxygen is _____ .
A) ether
B) amine
C) alcohol
D) acid
45. The formula CH3CH2COOCH2CH3 represents a/an _____ .
A) ester
B) ether
C) alcohol
D) ketone
46. The compound with the molecular formula C7H7Cl cannot be _____.
A) 4-chlorotoluene
B) benzyl chloride
C) 3-chloropentane
D) 2-chlorotoluene
47. How many carbon atoms are in the 2,3-dimethylpentane molecule?
A) 5
B) 6
C) 7
D) 10
48. The correct order of reactivity among the following pairs is _____.
A) CH2 = CH2 < CH4
B) CH3CHO > CH3COCH3
C) CH3CH2OH < CH3OCH3
D) acid < ester
49. Compounds that form hydrogen bonds with water are _____.
A) ethers
B) alkanes
C) alcohols
D) alkenes
50. How many different isomers can be derived from ethylene if two hydrogen atoms are
replaced by a fluorine atom and a chlorine atom?
A) 2
B) 3
C) 4
D) 5
51. The compound that does not form hydrogen bonds with water is _____.
A) benzene
B) phenol
C) acetic acid
D) ethylamine
52. Besides water, the major component of vinegar is _____.
A) ethanol
B) acetic acid
C) lactic acid
D) phenol
53. Alcoholic beverages contain _____.
A) CH3CHO
B) CH3COCH3
C) CH3COOH
D) CH3CH2OH
54. The substance used as automotive antifreeze is _____.
A) glycerol
B) ethylene glycol
C) CH3COOH
D) CH3OH
55. Natural gas mainly consists of _____.
A) C2H6
B) C3H8
C) CH4
D) C6H6
56. Ethylene is chemically most similar to _____.
A) acetylene
B) propylene
C) benzene
D) toluene
57. How many carbon–carbon sigma bonds are present in the benzene molecule?
A) six
B) twelve
C) three
D) eighteen
58. The number of carbon–carbon sigma bonds in the cyclohexane molecule is _____.
A) 12
B) 6
C) 18
D) 3
59. The number of carbon–carbon sigma bonds in the 2-methyl-3-ethylpentane molecule is
_____.
A) 6
B) 8
C) 5
D) 7
60. The total number of sigma bonds in a benzene molecule is _____.
A) 12
B) 8
C) 6
D) 18
61. The total number of sigma bonds in a cyclohexane molecule is _____.
A) 24
B) 18
C) 12
D) 10
62. Which of the following molecules does not contain two -bonds?
A) acetylene
B) 1,3-butadiene
C) 2-propyne
D) propylene
63. The compound not having empirical formula CH is _____.
A) cyclobutadiene
B) benzene
C) acetylene
D) 1,3-butadiene
64. The percentage by mass of oxygen in C2HCl3O is _____.
A) 20.12
B) 10.85
C) 32.15
D) 16.2
65. Compounds with the C4H8Cl2 molecular formula can exhibit _____ isomerism.
A) optical
B) geometrical
C) functional
D) no
66. Combustion of an unknown organic compound is used to determine its ____.
A) degree of unsaturation
B) functional groups
C) density
D) empirical formula
67. 2-bromo-3-methyl-1-butene can be obtained from 3-methyl-1-butyne by the action of
_____.
A) Br2
B) HBr
C) HBr, peroxide
D) CH3Br
68. 3-methyl-1-butyne can be converted into 1,2-dibromo-3-methylbutane by using _____.
A) 2 moles of HBr
B) HBr/peroxide
C) Br2
D) none of the above
69. The reaction of 2 moles of HBr with 1-butyne yields _____.
A) 1,1-dibromobutane
B) 1,2-dibromobutane
C) 2,2-dibromobutane
D) 1,3-dibromobutane
70. A compound containing an asymmetric carbon is _____.
A) 1,1-dibromocyclopropane
B) 1,2-dibromobutane
C) 1,1-dibromopropane
D) 2,2-dibromobutane
71. An optically inactive compound among the following is _____.
A) aminoacetic acid
B) 2-aminopropanoic acid
C) 2-chlorobutane
D) 2-bromo-1-propanol
72. Dichlorobenzene would have _____ isomers if the molecule had no resonance.
A) five
B) four
C) six
D) three
73. Propanal is an isomer of _____.
A) propanol
B) propanaldehyde
C) acetone
D) propane
74. Ethanol and dimethyl ether are _____ isomers.
A) functional
B) stereo
C) position
D) geometrical
75. The compound having the lowest boiling point is _____.
A) C2H5OH
B) CH3CHO
C) CH3OCH3
D) CH3COCH3
76. Which of the following is the least soluble in water?
A) CH3CH2OH
B) CH3COOH
C) CH3CH3
D) CH3CHO
77. The unpleasant smell of fish is due to volatile _____.
A) amines
B) alcohols
C) acids
D) esters
78. Benzene can be differentiated from cyclohexane using _____.
A) conc HCl
B) conc HNO3
C) HBr
D) HCOOH
79. Wood spirit is _____.
A) methyl alcohol
B) ethyl alcohol
C) acetic acid
D) acetone
80. Marsh gas is _____.
A) ethane
B) methane
C) butane
D) methanol
81. Which of the following will exhibit isomerism?
A) 1-butyne
B) 2-butyne
C) 1-butane
D) 2-butene
82. The number of asymmetric carbon atoms in 1,2-dichloropropane is _____.
A) three
B) none
C) two
D) one
83. The number of asymmetric carbon atoms in a molecule of 1,3-dichlorobenzene is
_____.
A) zero
B) 1
C) 2
D) 3
84. Propylene can be converted into isopropanol using _____.
A) dil H2SO4
B) KMNO4
C) Br2/H2O
D) HNO3
85. Rubbing alcohol is _____.
A) ethyl alcohol
B) methyl alcohol
C) n-propyl alcohol
D) isopropyl alcohol
86. Grain alcohol is _____.
A) CH3OH
B) CH3CH(OH)CH3
C) CH3CH2OH
D) CH3CH2CH2OH
87. Trans-2-pentene is an isomer of _____.
A) trans-2-butene
B) pentane
C) cyclopentane
D) pentyne
88. Fat hydrolysis yields _____.
A) ethyl alcohol
B) ethylene glycol
C) glycerol
D) isopropyl alcohol
89. Lye is a solution of _____.
A) NaCl
B) Na2CO3
C) NaOH
D) NaNO3
90. The iodine value of an oil is defined as the number of grams of iodine that can react
with _____ of the oil.
A) 1 kg
B) 100 g
C) 1000 mg
D) 100 kg
91. Iodine values are used to determine the _____ of an oil.
A) degree of unsaturation
B) molecular weight
C) molecular formula
D) degree of branching
92. Iodine reacts with Na2S2O3 to yield _____.
A) Na2S
B) Na2SO4
C) Na2S4O6
D) Na2SO3
93. Soaps are sodium salts of _____.
A) glycerol
B) fatty acids
C) glycol
D) sulphonic acid
94. Chemically, oils are similar to _____.
A) enzymes
B) proteins
C) fats
D) cholesterol
95. Chemically, oils are _____.
A) amides
B) ethers
C) esters
D) ketones
96. Fatty acids are _____.
A) monocarboxylic acids
B) monohydric alcohols
C) polycarboxylic acids
D) dicarboxylic acids
97. Which of the following statements is correct?
A) oils are solids and fats are liquids
B) fats are solids and oils are liquids
C) oils and fats are liquids
D) oils and fats are solids
98. Oils are converted into solids by _____.
A) iodination
B) oxidation
C) hydration
D) hydrogenation
99. A byproduct of soap manufacturing is _____.
A) fatty acids
B) glycerol
C) glycol
D) acetone
100. Iodine concentrations can be determined by titration with _____.
A) sodium sulfide
B) sodium thiosulfate
C) sodium sulfate
D) sodium sulfite
Answer Key
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48.
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50.
C
B
D
A
B
B
C
B
D
B
C
B
D
A
B
D
A
C
A
C
A
B
A
A
D
A
C
C
A
C
A
B
D
A
B
B
C
C
D
C
B
A
A
B
A
C
C
B
C
B
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.
90.
91.
92.
93.
94.
95.
96.
97.
98.
99.
100.
A
B
D
B
C
B
A
B
D
A
B
D
D
B
A
D
B
C
C
B
A
B
C
A
C
C
A
B
A
B
D
D
A
A
D
C
C
C
C
B
A
C
B
C
C
A
B
D
B
B