Name__________________________Review Organic Reactions Date__________________

1. A molecule of a compound contains a total of 10 7. A molecule of butane and a molecule of 2-butene

hydrogen atoms and has the general formula CnH2n+2. both have the same total number of
Which prefix is used in the name of this compound?
A) carbon atoms B) hydrogen atoms
A) but- B) dec- C) oct- D) pent- C) single bonds D) double bonds
2. Which compound is a saturated hydrocarbon? 8. A carbon-carbon triple bond is found in a molecule of
A) CH 2CH 2 B) CH 3CH 3 A) butane B) butanone
C) CH 3CHO D) CH 3CH 2OH C) butene D) butyne
3. Which formula represents an unsaturated 9. Given the structural formula:
hydrocarbon?
A) B) What is the total number of electrons shared in the
bond between the two carbon atoms?
A) 6 B) 2 C) 3 D) 4
10. Which molecular formula can be represented by the
C) D) structural formula shown below?

A) C6H 6 B) C6H10
4. In which group could the hydrocarbons all belong to C) C6H12 D) C6H14
the same alkene series?
11. Which compound represents a member of the
A) C2H 2, C2H 4, C2H 6 benzene series?
B) C2H 2, C2H 4, C4H 8
C) C2H 4, C2H 6, C3H 6 A) acetylene B) ethylene
D) C2H 4, C3H 6, C4H 8 C) toluene D) propene

5. Which formula represents an unsaturated 12. Cracking hydrocarbon molecules will result in
hydrocarbon? A) larger molecules with lower boiling points
A) B) B) larger molecules with higher boiling points
C) smaller molecules with lower boiling points
D) smaller molecules with higher boiling points
13. Petroleum is a complex mixture of
C) D)
A) hydroxides B) hydrocarbons
C) esters D) ethers
14. A common gaseous fuel that is often found with
6. A straight-chain hydrocarbon that has only one double petroleum is
bond in each molecule has the general formula A) carbon monoxide B) carbon dioxide
A) CnH2n – 6 B) CnH2n – 2 C) methane D) ethene
C) Cn H 2n D) CnH2n + 2 15. Which atoms can bond with each other to form
chains, rings, or networks?
A) carbon atoms B) hydrogen atoms
C) oxygen atoms D) nitrogen atoms
 Review Organic Reactions

16. Butanal and butanone have different chemical and 19. Given a formula representing a compound:
physical properties primarily because of differences
in their
A) functional groups
B) molecular masses
Which formula represents an isomer of this
C) molecular formulas
compound?
D) number of carbon atoms per molecule
A)
17. Which two compounds have the same molecular
formula but different chemical and physical
properties?
A) CH 3CH 2Cl and CH 3CH 2Br B)
B) CH 3CHCH 2 and CH 3CH 2CH 3
C) CH 3CHO and CH 3COCH 3
D) CH 3CH 2OH and CH3OCH 3
C)
18. Which structural formula is incorrect?
A)
D)

B)
20. Given the three organic structural formulas shown
below:
C)

D)
Which organic compound classes are represented by
these structural formulas, as shown from left to
right?
A) ester, organic acid, ketone
B) ester, aldehyde, organic acid
C) ketone, aldehyde, alcohol
D) ketone, organic acid, alcohol
 Review Organic Reactions

21. Which structural formula is correct for 25. Which structural formula represents
2-methyl-3-pentanol? 1,1-dibromopropane?
A) A) B)

C) D)

B)

26. The reaction between an organic acid and an alcohol

produces
A) an aldehyde B) a ketone
C) an ether D) an ester
C)
27. Which formula correctly represents an ester?
A) CH 3CH 2CH 2OH B) CH 3COCH 3
C) CH 3COOCH 3 D) CH 3CH 2COOH
28. In the reaction

C2H5OH + CH 3OH ® C2H5OCH3 + H2O,

D)
the organic compound formed is
A) an aldehyde B) a ketone
C) an acid D) an ether
29. Which formula represents the product of the addition
reaction between ethene and chlorine, Cl 2?
22. The organic compound represented by the
condensed structural formula CH3CH 2CH 2CHO is A) B)
classified as an
A) alcohol B) aldehyde
C) ester D) ether
C) D)
23. Which formula represents a ketone?
A) HCOOH B) HCHO
C) CH 3COCH 3 D) CH 3CH 2OH
24. What is the minimum number of carbon atoms a
ketone may contain?
A) 1 B) 2 C) 3 D) 4
 Review Organic Reactions

30. Given the equation: 35. When hydrocarbons burn completely in an excess of
oxygen, the products are
C2H6+ Cl 2 ® C2H5Cl + HCl A) carbon monoxide and water
B) carbon dioxide and water
This reaction is best described as
C) carbon monoxide and carbon dioxide
A) addition involving a saturated hydrocarbon D) carbon dioxide and carbon
B) addition involving an unsaturated hydrocarbon
C) substitution involving a saturated
hydrocarbon
D) substitution involving an unsaturated
hydrocarbon
31. Given the equation:

Which type of reaction is represented by this

equation?
A) combustion B) esterification
C) polymerization D) substitution
32. Cellulose, protein, and starch are classified as
A) aldehydes
B) esters
C) synthetic polymers
D) natural polymers
33. Given the incomplete reaction:

Which compound is represented by x?

A) B)

C) D)

34. In which organic reaction is sugar converted to an

alcohol and carbon dioxide?
A) esterification B) addition
C) substitution D) fermentation
 Review Organic Reactions

Base your answers to questions 36 through 38 on

information below.

One type of soap is produced when ethyl stearate and sodium hydroxide react. The soap
produced by this reaction is called sodium stearate. The other product of the reaction is ethanol.
This reaction is represented by the balanced equation below.

36. Identify the two types of bonds in the compound sodium stearate.

37. To which class of organic compounds does ethyl stearate belong?

38. Identify the type of organic reaction used to make soap.

39. Two hydrocarbons that are isomers of each other are represented by the structural formulas and
molecular formulas below.

Explain, in terms of structural formulas and molecular formulas, why these hydrocarbons are isomers
of each other.

40. Two hydrocarbons that are isomers of each other are represented by the structural formulas and
molecular formulas below.

Explain, in terms of bonds, why these hydrocarbons are unsaturated.

 Review Organic Reactions

Base your answers to questions 41 and 42 on the

information below.

Gasoline is a mixture composed primarily of

hydrocarbons such as isooctane, which is also known
as 2,2,4-trimethylpentane.
Gasoline is assigned a number called an octane
rating. Gasoline with an octane rating of 87 performs
the same as a mixture that consists of 87% isooctane
and 13% heptane.
An alternative fuel, E-85, can be used in some
automobiles. This fuel is a mixture of 85% ethanol
and 15% gasoline.
41. In the space below, draw a structural formula for a
molecule of 2,2,4-trimethylpentane.

42. Identify the functional group in a molecule of

ethanol in the alternative fuel E-85.
 Answer Key
Organic Chemistry Review

1. A 36. —covalent
2. B bonds and ionic
bonds —polar
3. B and nonpolar
4. D —single and
double
5. A
37. ester or esters
6. C
38. saponification
7. A
39. The molecular
8. D
formulas of the two
9. A hydrocarbons are the
10. A same, but the
structural formulas
11. C are different.
12. C 40. —A hydrocarbon 1
13. B molecule has two
14. C carbon-carbon
double bonds and a
15. A hydrocarbon 2
16. A molecule has one
carbon-carbon triple
17. D
bond. —Both
18. D hydrocarbons have
19. B at least one multiple
covalent bond
20. D
between two carbon
21. B atoms.
22. B 41.
23. C
24. C
25. D
26. D 42. –OH or alcohol or
27. C hydroxyl

28. D
29. B
30. C
31. C
32. D
33. A
34. D
35. B