CHE 160
REVIEW CH #19-22
1. Choose the most metallic element.
a)
b)
c)
d)
e)
N
P
As
Sb
Bi
2. Choose the most metallic element.
a)
b)
c)
d)
e)
N
P
As
Sb
Bi
3. Which Group 5A element cannot form molecules with five covalent bonds?
a)
b)
c)
d)
e)
N
P
As
Sb
Bi
4. The process of transforming N2 to a form usable by animals and plants is called
a)
b)
c)
d)
e)
nitrogen fixation.
fertilization.
denitrification.
the Ostwald process.
nitrogenation.
5. The oxidation state of the sulfur atom in S2O32– is:
a)
b)
c)
d)
e)
0
1
2/3
2
3
6. Choose the species with the largest bond strength.
a)
b)
c)
d)
e)
F2
Cl2
Br2
I2
All are the same.
7. Choose the species with the largest bond strength.
a)
b)
c)
d)
e)
F2
Cl2
Br2
I2
All are the same.
8. Choose the species with the smallest hydration energy (absolute value).
a)
b)
c)
d)
e)
F–
Cl–
Br–
I–
all the same
9. Phosphoric acid easily undergoes _____________ reactions.
a)
b)
c)
d)
e)
addition
substitution
polymeric
condensation
nucleophilic
10. What Group 6A elements are semiconductors?
a)
b)
c)
d)
e)
selenium and polonium
tellurium and polonium
sulfur and selenium
selenium and tellurium
sulfur and tellurium
11. ]Nitroglycerin, the main component of dynamite, decomposes very rapidly and exothermically
according to the equation:
4 C3H5N3O9(l)  6 N2(g) + 12 CO2(g) + 10 H2O(g) + O2(g) + energy
What is the total volume of products that would be produced from 550. g of nitroglycerin? Assume the heat released caused
the temperature to become 233˚C and the pressure to be 10.0 atm.
a)
b)
c)
d)
e)
2280 L
72.9 L
33.6 L
17.6 L
10.1 L
12. Which of the following is not a compound?
a)
b)
c)
d)
e)
XeF4
KrF2
ArBr4
XeO3
At least two of the above are not compounds.
13. Which of the following titration curves best represents phosphorous acid, H3PO3, being titrated with a
strong base?
a)
b)
c)
d)
e)
14. Which metal ion has a d5 electron configuration?
a)
b)
c)
d)
e)
Pd2+
Ag+
Fe3+
Os2+
Co2+
15. A coordination compound of Cu2+ can be described as Cu(NH3)xSO4 and is known to contain 29.9%
NH3. The value of x is:
a)
b)
c)
d)
e)
2
3
4
6
none of these
16. Ethylenediamine (en) is a bidentate ligand. What is the coordination number of cobalt in
[Co(en)2Cl2]Cl?
a)
b)
c)
d)
e)
four
five
seven
eight
six
17. You discover that the complex decomposes in water. You dissolve 0.1000 g of the complex in H2O and
add excess NaHg(SCN)4, which precipitates Co(II) as CoHg(SCN)4(s). After the precipitate is washed
and dried, its mass is 0.1102 g. How many grams of cobalt are contained in 0.100 g of the complex?
a)
b)
c)
d)
e)
0.1102
0.0396
0.0132
0.437
0.0548
18. You analyze for pyridine (Kb is approximately 10–9) by dissolving 0.1000 g of complex in 10 mL of H2O
and titrating with a 0.01 M HCl solution. Which of the following indicators should be used to detect the
endpoint? (Assume that the initial concentration of pyridine is approximately 0.01 M.)
a)
b)
c)
d)
e)
bromophenol blue, pH range of color change = 3.0–4.6
methyl red, pH range of color change = 4.8–6.0
bromothymol blue, pH range of color change = 6.0–7.6
thymol blue, pH range of color change = 8.0 –9.6
alizarin yellow, pH range of color change = 10.1–12.0
19. Which of the following ligands might give linkage isomers?
a)
b)
c)
d)
e)
NO2–
SCN–
H2NHC2CH2NH2
a and b
a, b, and c
20. Give the number of geometrical isomers for the octahedral compound [MA2B2C2], where A, B, and C
represent ligands.
a)
b)
c)
d)
e)
1
2
3
5
none of these
21. The ____ isomer of the complex Ni(en)2Cl2 exhibits optical isomers, but the _____ isomer does not.
a)
b)
c)
d)
cis, trans
trans, cis
Both isomers exhibit optical isomers.
Neither isomers exhibit optical isomers.
22. Which of the transition metals is the best conductor of heat and electric current?
a)
b)
c)
d)
e)
copper
silver
gold
tungsten
titanium
23. The reducing abilities of the first-row transition metals generally __________ going from left to right
across the period.
a)
b)
c)
d)
e)
decrease
increase
stay the same
none of these
remain at 1.0 V
24. The reducing abilities of the first-row transition metals generally __________ going from left to right
across the period.
a)
b)
c)
d)
e)
decrease
increase
stay the same
none of these
remain at 1.0 V
25. Which of the following statements concerning the complex ion Co(en)2Cl2+ is true?
(en = ethylenediamine, NH2CH2CH2NH2)?
a)
b)
c)
d)
e)
The complex ion contains Co(I).
The complex ion exhibits cis and trans geometric isomers, but no optical isomers.
The complex ion exhibits two geometric isomers (cis and trans) and two optical isomers.
Since en is a strong field ligand (large ), the complex ion is paramagnetic.
The geometric isomers of the complex ion have identical chemical properties.
26. Which of the following is paramagnetic?
a)
Zn(H2O)62+
b)
Co(NH3)63+ (strong field)
c)
Cu(CN)32–
d)
Mn(CN)62– (strong field)
e)
none of these
27. Calculate the total number of unpaired electrons in the following complex ions: Zn(OH2)62+, Ni(CN)42–
(square planar), Co(NH3)63+ (strong field).
a)
b)
c)
d)
e)
0
1
2
3
4
28. Which of the following crystal field diagrams is correct for Mn(CN)63– (CN– is a strong field ligand)?
a)
b)
c)
d)
29. Choose the most likely pattern for the crystal field diagram for the complex trans–[Ni(NH3)2(CN)4]2–
where CN– produces a much stronger crystal field than does NH3.
a)
b)
c)
d)
e)
30. The empirical formula of a compound with a mass percent composition of 6.78% H, 31.43% N, 39.76%
Cl, and 22.03% Co is consistent with which of the following complexes?
a)
b)
c)
d)
e)
[Co(NH3)3Cl3]
[Co(NH3)4Cl2]Cl
[Co(NH3)5Cl]Cl2
[Co(NH3)6]Cl3
none of these
31. For which of the following metal ions would there be no low-spin versus high-spin distinction in
octahedral complexes?
a)
b)
c)
d)
e)
Cr2+
V2+
Fe3+
Mn2+
Co3+
32. The spectrochemical series is
I– < Br– < Cl– < F– < OH– < H2O < NH3 < en < NO2– < CN–
Which of the following complexes will absorb visible radiation of the highest energy (shortest
wavelength)?
a)
b)
c)
d)
e)
[Co(H2O)6]3+
[Co(I)6]3–
[Co(OH)6]3–
[Co(en)3]3+
[Co(NH3)6]3+
33. The strength of steel is due to the effect of what substance with the iron?
a)
b)
c)
d)
e)
copper
carbon monoxide
sulfur
carbon
zinc
34. Name the following:
H
CH3CH2CCH3
CH3
a)
b)
c)
d)
e)
isopropane
methylpentane
methylbutane
n-pentane
dodecane
35. Name the following:
H
HCH
H
H
HCH
H
H
H
C
C
C
C
C
H
H
H
HCH
H
H
HCH
H
a)
b)
c)
d)
e)
2,4-diethylpentane
3,5-dimethylheptane
secondary ethylpentane
2,3-dimethyl-2,3-diethylpropane
none of these
36. A student gave a molecule the following name:
2-methyl-4-t-butylpentane
However, the teacher pointed out that, although the molecule could be correctly drawn from this name,
the name violates the IUPAC rules. What is the correct (IUPAC) name of the molecule?
a)
b)
c)
d)
e)
2-t-butyl-4-methylpentane
2,2,3,5-tetramethylhexane
2,4,5,5-tetramethylhexane
1-sec-butyl-1,2,2-trimethylpentane
none of these (a-d)
37. Name the following:
CH2CH3
CH3 C
C
C
H
H
a)
b)
c)
d)
e)
1-hexyne
2-ethynyl butane
2-ethyl-3-butyne
3-methyl-1-pentyne
3-methyl-4-pentyne
38. CH3C  CCH2CH2Cl is named:
a)
b)
c)
d)
e)
1-chloro-3-pentyne
5-chloro-2-pentene
1-acetylenyl-3-chloropropane
5-chloro-2-pentyne
1-chloro-3-pentene
39. Which of the following compounds can exhibit geometrical isomerism?
40. How many structural and geometrical isomers are there of chloropropene?
a)
b)
c)
d)
e)
2
3
4
5
more than 5
41. Which of the following types of compounds must have an sp2-hybridized carbon center?
a)
b)
c)
d)
e)
ethers
ketones
alcohols
alkanes
amines
42. For which of the following compound(s) are cis and trans isomers possible?
a)
b)
c)
d)
e)
2,3-dimethyl-2-butene
3-methyl-2-pentene
4,4-dimethylcyclohexanol
ortho-chlorotoluene
All can exhibit cis/trans isomers.
43. Which of the following has an optical isomer?
CH3
a)
CH3
C
OH
CH3
Br
b)
CH3
CH2
CH3
C
CH3
O
c)
CH3CH2CH2COH
NH
2
d)
CH3CH2C
CH OH
2
CH
3
e)
none of these
44. Name the following:
H
H O H C
H
H C C O C
H
H
H C
H
a)
b)
c)
d)
e)
n-propyl acetate
isopropyl formate
isopropyl acetate
ethyl propanoate
none of these
H
45. Name the following:
a)
b)
c)
d)
e)
H
H
H C
C
H
H
O
H
H
C
C H
H
H
acetone
butyraldehyde
diethylketone
diethyl ether
none of these
46. Name the following:
Cl
O
CH3 CH CH C CH(CH3)2
CH2
CH3
a)
b)
c)
d)
e)
2-chloro-3-ethyl-1-isopropylbutanone
isopropyl-chloro,methylbutyl ketone
2-butyl,chloro,isobutanoyl methane
4-chloro-2,5-dimethyl-3-heptanone
3-methyl-4-chloro-1-isopropylpentanone
47. Which of the following is known as wood alcohol?
a)
b)
c)
d)
e)
methanol
ethanol
propanol
isopropanol
none of these
48. Teflon is an example of a
a)
b)
c)
d)
e)
copolymer
homopolymer
dimer
two of these
none of these
49. Identify the type of organic compound shown:
CH3 C
O
O
CH3
a)
b)
c)
d)
e)
aldehyde
ester
amine
ketone
none of these
50. Which structure represents an optically active aldehyde?
H
CH3CH2 C
OH
CH3
a)
H
CH3CH2 C
CHO
CH3
b)
O
CH3 CH C CH3
c)
CH3
H
CH3 CH2 C NH2
CH3
d)
CH3
CH3 C CH2 CHO
e)
CH3
51. Which of the following becomes more soluble in water upon addition of NaOH?
a)
b)
c)
d)
e)
an amine
a carboxylic acid
an amine
an aromatic hydrocarbon
an alkane
52.
When the following organic compound is oxidized, what is the major organic product?
CH2CH3
CH3CH2CHOH
a)
b)
c)
d)
e)
KMnO4
3-pentanoic acid
3-pentanol
3-pentanone
3-pentanal
no reaction takes place
53. Which of the following pairs of substances could form a polyester?
a)
b)
c)
d)
e)
H2C=CHCH3 + HOCH2CH2COOH
HO(CH2)4COOH + HOCH2CH=CHCH3
H2C=CHCN + H2C=CHCH3
HOCH2CH2OH + HOOCCOOH
H2NCH2COOH + H2NCH2CH2COOH
54. Consider the polymer drawn below:
CH3
C
CH3
CH2 C
CH3
CH3
CH3
CH2 C
CH2
n
CH3
What monomer(s) is (are) needed to produce the above polymer?
a)
CH2 = CH2 and CH3CH = CH2
b)
CH2 = C(CH3)2
c)
CH3CH = CHCH3
d)
CO and CH2 = CH2
e)
none of the above
55. What organic compounds typically have strong odors?
a)
b)
c)
d)
e)
aldehydes
alkynes
carboxylic acids
amines
two of these
56. In condensation polymerization, a common by-product is:
a)
b)
c)
d)
ethylene
alcohol
aldehyde
water
57. Draw the isomers for C4H10.
58. Which one of the following statements about the structure of proteins is incorrect?
a)
b)
c)
d)
e)
Disulfide bonds provide strong intrachain interactions.
Hydrogen bonding stabilizes the -helix proteins.
Nonpolar groups tend to face the outside of a protein in an aqueous solution.
Ionized amino acid side chains can form salt bridges within a protein.
Heat can disrupt tertiary structure.
59. The structures of proteins are partially determined by the order of various amino acids in the
macromolecule. This level of structural determination is known as
a)
b)
c)
d)
e)
primary structure.
secondary structure.
tertiary structure.
quaternary structure.
order of bases.
60. Which of the following is the best description of a protein?
a)
b)
c)
d)
e)
an alternating chain of amino acids and nucleic acids
a chain of amino acids connected by ester bonds
two antiparallel chains of nucleic acids connected by hydrogen bonding
a chain of amino acids formed by condensation polymerization
a chain of nucleotides connected by phosphodiester bonds
61. Which of the following is not a function of proteins?
a)
b)
c)
d)
e)
structure
catalysis
oxygen transport
energy transformation
All of these are functions of proteins.
62. The condensation product of two amino acids is a(n)
a)
b)
c)
d)
e)
peptide.
ketone.
ether.
ester.
alcohol.
63. Hydrogen bonding between C=O groups and NH–groups in the backbone of a protein determines
the
a)
b)
c)
d)
e)
primary structure.
secondary structure.
tertiary structure.
quaternary structure.
all of these
64. The secondary and tertiary structures of most biomolecules are determined by
a)
b)
c)
d)
e)
hydrophobic bonding.
hydrogen bonding.
salt bridges.
disulfide bonds.
all of these
65. When heat is added to proteins, the hydrogen bonding in the secondary structure breaks apart. What
are the algebraic signs of H and S for the denaturation process?
a)
b)
c)
d)
e)
Both H and S are positive.
Both H and S are negative.
H is positive and S is negative.
H is negative and S is positive.
H is positive and S is 0.
66. The process of breaking down the three-dimensional structure of a protein is called
a)
b)
c)
d)
e)
degradation.
denaturation.
decomposition.
fission.
none of these.
67. What are the building blocks of proteins?
a)
b)
c)
d)
e)
nucleotides
glucose and sucrose
lipids
amino acids
esters
68. The monomers that make up a starch molecule are:
I.
II.
III.
IV.
optically active
not optically active
aldehydes
ketones
69. Which of the following is not a monosaccharide?
a)
b)
c)
d)
e)
sucrose
glucose
fructose
galactose
All of the above (a-d) are monosaccharides.
70. Table sugar is a disaccharide formed from
a)
b)
c)
d)
e)
alpha-D-glucose and fructose
beta-D-glucose and fructose
D-galactose and D-ribose
D-galactose and fructose
none of these
71. Draw and name the missing product below. Draw and name the missing product below.
Draw and name the two possible missing products below.
acid
CH3CH=CH2 + H2O
?
catalyst