Chapter 24 Organic Chemistry

Chapter 24 Organic Chemistry

Student: ______

1. The general formula for alkenes is

A. CnH2n+2

B. C2nH2n

C. CnHn+2

D. CnH2n

E. CnH2n-2

2. The general formula of an alkane is

A. CnH2n

B. CnH2n+2

C. CnH2n-2

D. CnH2n+4

E. CnH2n-4

3. Which one of these formulas is that of an unsaturated hydrocarbon?

4. Which of these molecules is unsaturated?

A. C3H8

B. CH3OH

C. C5H10

D. CH4

E. C4H10

5. The formula represents

A. an alkane.

B. an alkyne.

C. an alcohol.

D. an unsaturated hydrocarbon.

E. a CFC.

6. Which one of these hydrocarbons does not have isomers?

A. C7H16

B. C6H14

C. C5H10

D. C4H8

E. C3H8

7. How many structural isomers are there of C4H10?

A. 4

B. 6

C. 2

D. 8

E. 10

8. Which of these species are structural isomers of C6H14?

A. I and II

B. I and III

C. II and III

D. II and IV

E. III and IV

9. Which of these pairs are geometric isomers?

10. The two molecules represented below are examples of

A. isomers

B. isotopes

C. alcohols

D. carboxylic acids

E. unsaturated hydrocarbons

11. The two molecules represented below are examples of

A. geometric isomers.

B. structural isomers.

C. optical isomers.

D. stereoisomers.

E. none of these

12. Which of these species is an aromatic compound?

A. C2H2

B. C6H12

C. C6H4Br2

D. C5H10

E. C2H4Br2

13. The octane rating of gasoline refers to its

A. percentage C8H18 by volume.

B. radiation dose.

C. alcohol level.

D. ability to resist engine knocking.

E. percentage of unsaturated hydrocarbons.

14. Which one of these hydrocarbon chains would have the highest octane rating?

15. 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.

16. The alkane with six carbon atoms is called

A. butane.

B. hexane.

C. heptane.

D. butene.

E. none of these.

17. Which of these is the systematic name for the compound represented below?

A. 2-ethylbutane

B. 3-methylpentene

C. 3-methyl-1-pentene

D. 3-methyl-1-hexene

E. 2-methylhexane

18. The systematic name for the compound represented below is

A. 4,5-diethylheptane.

B. 3-propyl-4-ethylhexane.

C. 3-ethyl-4-propylhexane.

D. 3-methyl-4-propylheptane.

E. 2-ethyl-4-propylhexane.

19. Which of these is the systematic name for the compound represented below?

A. 2,3-dibromopentane

B. 1,2-dibromopentane

C. 2,3-dibromopropane

D. 1,2-propane dibromide

E. 1,2-dibromopropane

20. The correct structure for 2,3,3-trimethylpentane is

21. The group of atoms that is responsible for the characteristic properties of a family of organic compounds is called a/an ______group.

A. hydrocarbon

B. functional

C. ether

D. enzyme

E. polyatomic ion

22. 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.

23. Which one of these structures represents a carboxyl functional group

24. Which one of these structures represents an ester functional group?

25. Which one of these choices is the formula for a ketone?

A. CH3CHO

B. CH3OCH3

C. CH3COCH3

D. CH3COOH

26. "Wood alcohol" is the common name for

A. methanol.

B. ethanol.

C. propyl alcohol.

D. ethylene.

E. acetylene.

27. The name for the compound with the formula CH3CH2CH2CH2OH is

A. propanol.

B. propane.

C. butanol.

D. pentane.

E. pentanol.

28. Which type of organic compound does not contain a carbonyl group?

A. ethers

B. carboxylic acids

C. ketones

D. aldehydes

E. 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. 2C + H2 ® C2H2

B. C2H4 ® C2H2 + H2

C. 2CO + 2H2O ® C2H2 + H2O2

D. CaC2 + 2H2O ® C2H2 + Ca(OH)2

30. Which one of these compounds will result from the addition of HCl to?

E. none of these

31. Which is the product of the reaction of one mole of HCl with one mole of 1-butyne?

A. 1-chloro-1-butene

B. 1-chloro-2-butene

C. 2-chloro-1-butene

D. ethyl chloride + acetylene

32. 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.

33. The reaction of ethylene and water yields

A. an aldehyde.

B. an ester.

C. an alcohol.

D. an ether.

E. an organic acid.

34. Oxidation of the 2-propanol will produce a/an

A. aldehyde.

B. amine.

C. alkene.

D. ketone.

E. carboxylic acid.

35. Esters are synthesized from two classes of organic compounds. Those two types of compounds are

A. acids and bases.

B. amines and alcohols.

C. alcohols and acids.

D. amines and alkenes.

E. alkenes and bases.

36. Which choice gives the structures of the reaction products when the ester below is hydrolyzed in acid solution?

37. The reaction of Cl2 with CH4 to produce methyl chloride is an example of a/an

A. free radical reaction.

B. addition reaction.

C. reduction reaction.

D. ester hydrolysis.

E. polymerization.

38. Which of these statements describes a condensation reaction?

A. addition of H2O to a double bond

B. linking an acid and an alcohol to make an ester and water

C. addition of H2 to an alkene

D. oxidation of ethanol to acetaldehyde

E. hydrolysis of an ester

39. Bromination of benzene (C6H6), an aromatic compound,

A. occurs by substitution rather than addition.

B. occurs by addition rather than substitution.

C. occurs more rapidly than bromination of a nonaromatic compound.

D. results in formation of 1,2,3,4,5,6-hexabromocyclohexane.

E. occurs in the absence of a catalyst.

40. Amines are

A. organic bases that react with water to produce ammonia.

B. organic acids that react with water to produce ammonia.

C. organic bases that react with acids to form ammonium salts.

D. organic acids that react with bases to form ammonium salts.

E. none of these.

41. Which of these reactions leads to a change in the hybridization of one or more carbon atoms?

A. free radical halogenation of an alkane

B. hydrolysis of an ester to yield an acid and an alcohol

C. substitution of an aromatic ring using a halogen

D. oxidation of an alcohol to yield a carboxylic acid

E. 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. ether

B. alcohol

C. carboxylic acid

D. ketone

E. 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.
TrueFalse

50. The systematic name for the compound with the following structural formula is 4,5-dimethyl-2-hexene.
TrueFalse

51. The oxidation product of 1-propanol when using Cr2O72- as the oxidizing agent is acetone.
TrueFalse

52. The reaction of hydrogen chloride gas with propene will yield 1-chloropropane as the main product.
TrueFalse

53. Cycloalkanes have the general formula CnH2n.
TrueFalse

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