Download Review questions

Name: ____________________________________
1.
Given the structural formulas:
Which two formulas represent compounds that are isomers of each other?
A. A and B
B. A and C
C. B and D
D. C and D
2.
What is the total number of pairs of electrons shared between the carbon atom and the oxygen atom in a molecule
of methanal?
A. 1
B. 2
C. 3
D. 4
3.
Base your answer to the question on the information below.
A beaker contains 100.0 milliliters of a dilute aqueous solution of ethanoic acid at equilibrium.
The equation below represents this system.
Figure 1
Which graphic below is a correct structural formula for ethanoic acid?
1.
3.
2.
4.
4.
What is the general formula for the members of the alkane series?
A. CnH2n
B. CnH2n+2
C. CnH2n-2
D. CnH2n-6
5.
Given the structural formula:
This compound is classified as an
A. amide C. aldehyde
B. amine D. alcohol
6.
Which is the general formula for organic acids?
1.
3.
2.
4.
7.
Figure 2
Which is the correct name for the substance shown?
A. ethanol
B. ethyne
C. ethane
D. ethene
8.
Figure 3
Which type of reaction is represented by the equation in the diagram?
A. condensation polymerization
B. addition polymerization
C. esterification
D. saponification
9.
A molecule of a compound contains a total of 10 hydrogen atoms and has the general formula
CnH2n+2. Which prefix is used in the name of this compound?
A. butB. dec-
C. octD. pent-
10.
Which reaction is used to produce polyethylene (C2H4)n from ethylene?
A. addition polymerization
B. substitution
C. condensation polymerization
D. reduction
11.
Petroleum is a natural source of
A. alcohols
B. hydrocarbons
C. esters
D. ketones
12.
What is the IUPAC name of the organic compound that has the formula shown below?
A. 1,1-dimethylbutane
B. 2-methylpentane
C. hexane
D. 4-methylpentane
13.
Which general formula represents a ketone?
1.
3.
2.
4.
14.
Which structural formula represents an ether?
1.
3.
2.
4.
15.
Given the formula:
What is the IUPAC name of this compound?
A. 2-pentene
B. 2-pentyne
C. 2-butene
D. 2-butyne
16.
Which of the following hydrocarbons has the highest normal boiling point?
A. butene
B. ethene
C. pentene
D. propene
17.
All organic compounds must contain the element
A. phosphorus
B. oxygen
C. carbon
D. nitrogen
18.
The organic compound represented by the condensed structural formula CH 3CH2CH2CHO is
classified as an
A. alcohol
C. ester
B. aldehyde D. ether
19.
Two substances have different physical and chemical properties. Both substances have molecules
that contain two carbon atoms, one oxygen atom, and six hydrogen atoms. These two substances
must be
A. isomers of each other
C. the same compound
B. isotopes of each other D. the same hydrocarbon
20.
Figure 4
Replacing a hydrogen atom on the molecule shown in the diagram with the functional group -OH
will change the original properties of the molecule to those of an
A. ester
B. ether
C. acid
D. alcohol
21.
Which compound is an unsaturated hydrocarbon?
A. hexanal C. hexanoic acid
B. hexane
D. hexyne
22.
Ethane is a member of the hydrocarbon series with the general formula
A. CnH2n+2
B. CnH2n
C. CnH2n-2
D. CnH2n-6
23.
Which formula represents a saturated hydrocarbon?
A. C2H2
B. C2H4
C. C3H4
D. C3H8
24.
If a hydrocarbon molecule contains a triple bond, its IUPAC name ends in
A. "ane"
B. "ene"
C. "one"
D. "yne"
25.
Which formula represents 1,2-ethanediol?
A. C2H4(OH)2
B. C3H5(OH)3
C. Ca(OH)2
D. Co(OH)3
26.
Which structural formula represents an ether?
1.
3.
2.
4.
27.
Given the structural formula:
What is the IUPAC name of this compound?
A. propane
B. propene
C. propanone
D. propanal
28.
The empirical formula of a compound is CH2. Which molecular formula is correctly paired with a
structural formula for this compound?
A.
B.
C.
D.
29.
Which hydrocarbon is saturated?
A. propene
B. ethyne
C. butene
D. heptane
30.
Base your answer to this question on the information below.
The incomplete equation below represents an esterification reaction. The alcohol reactant is
represented by X.
Figure 5
What is the correct structural formula for the alcohol represented by X?
3.
1.
4.
2.
31.
Which pair of compounds are isomers?
A. NO2 and N2O4
B. P2O5 and P4O10
C. HCOOH and CH3COOH
D. CH3OCH3 and C2H5OH
32.
Nylon, starch, and cellulose are products formed as a result of
A. oxidation
B. fermentation
C. substitution
D. polymerization
33.
Given the equation: C2H6 + Cl2
C2H5Cl + HClThis reaction is best described as
A. addition involving a saturated hydrocarbon
B. addition involving an unsaturated hydrocarbon
C. substitution involving a saturated hydrocarbon
D. substitution involving an unsaturated hydrocarbon
34.
Which formula represents an alkene?
A. CH4
B. C2H2
C. C3H6
D. C4H10
35.
Which structural formula represents an alcohol?
1.
3.
2.
4.
36.
Base your answer to the question on the information below.
Given the balanced equation for an organic reaction between butane and chlorine that takes place
at 300.°C and 101.3 kilopascals:
Figure 6
Identify the type of organic reaction shown in the chemical equation.
A. addition
C. fermentation
B. saponification D. substitution
37.
The reaction CH2CH2 + H2 → CH3CH3 is an example of
A. substitution
B. addition
C. esterification
D. fermentation
38.
Which is the general formula for the alkane series of hydrocarbons?
A. CnH2n+2
B. CnH2n
C. CnH2n-2
D. CnH2n-6
39.
Which compound is an isomer of pentane?
A. butane
B. propane
C. methyl butane
D. methyl propane
40.
Given the equation:
To which class of organic compounds does product X belong?
41.
Which of these compounds has chemical properties most similar to the chemical properties of
ethanoic acid?
A. C3H7COOH
B. C2H5OH
C. C2H5COOC2H5
D. C2H5OC2H5
42.
Given the incomplete equation representing an organic addition reaction:
X(g) + Cl2(g) → XCl2(g)
Which compound could be represented by X?
A. CH4
B. C2H4
C. C3H8
D. C4H10
43.
Crude oil is a mixture of many hydrocarbons that have different numbers of carbon atoms. The
use of a fractionating tower allows the separation of this mixture based on the boiling points of
the hydrocarbons.
To begin the separation process, the crude oil is heated to about 400°C in a furnace, causing
many of the hydrocarbons of the crude oil to vaporize. The vaporized mixture is pumped into a
fractionating tower that is usually more than 30 meters tall. The temperature of the tower is
highest at the bottom. As vaporized samples of hydrocarbons travel up the tower, they cool and
condense. The liquid hydrocarbons are collected on trays and removed from the tower. The
diagram below illustrates the fractional distillation of the crude oil and the temperature ranges in
which the different hydrocarbons condense.
Figure 7
Base your answer to the question on the information and diagram and on your knowledge of
chemistry.
How many hydrogen atoms are present in one molecule of octane?
Answer:
44.
Which is the product of hydrolysis of an animal fat by a strong base?
A. water
B. gasoline
C. soap
D. toluene
45.
Which property is generally characteristic of an organic compound?
A. low melting point
B. high melting point
C. soluble in polar solvents
D. insoluble in nonpolar solvents
46.
Given the reaction:
This reaction is an example of
A. fermentation
B. saponification
C. hydrogenation
D. esterification
47.
Which two compounds are monohydroxy alcohols?
A. ethylene glycol and ethanol
B. ethylene glycol and glycerol
C. methanol and ethanol
D. methanol and glycerol
48.
Figure 8
Which is an adequate description of the compounds shown in the diagram?
A. They are isotopes of butanol.
B. They are isomers of butanol.
C. They are alkanes.
D. They are alkenes.
49.
Given the balanced equation with an unknown compound represented by X:
Which compound is represented by X?
A. CH3OH(aq)
B. CH2(OH)4(aq)
C. CH3CH2OH(aq)
D. CH2OHCH2OH(aq)
50.
Which element has atoms that can form single, double, and triple covalent bonds with other atoms
of the same element?
A. hydrogen
B. oxygen
C. fluorine
D. carbon
Answer Key for Organic chemistry review questions
1. A
2. B
3. C
4. B
5. A
6. B
7. D
8. A
9. A
10. A
11. B
12. B
13. C
14. B
15. A
16. C
17. C
18. B
19. A
20. D
21. D
22. A
23. D
24. D
25. A
26. D
27. B
28. B
29. D
30. C
31. D
32. D
33. C
34. C
35. B
36. D
37. B
38. A
39. C
40. ester or esters
41. A
42. B
43. 18
44. C
45. A
46. D
47. C
48. B
49. C
50. D