Difficulty Level: Easy
61. Determine the number of lone pairs of electrons on the indicated atom.
N
A. 1
B. 2
C. 3
D. 4
62. Draw all of the lone pairs on the following compound.
O
OOH
63. Draw all of the lone pairs on the following compound.
NNH2
64. For the following compound, is the indicated bond up or down?
OH
A. Up
B. Down
65. For the following compound, is the indicated bond up or down?
OH
OH
OH
A. Up
B. Down
C. Neither
66. For the following compound, is the indicated bond up or down?
O
A. Up
B. Down
C. Neither
67. Which of the following structures is the same as structure A?
123 4
A
A. 1
B. 2
C. 3
D. 4
68. Which of the following structures is a Fischer projection?
C6H12O6
OH
OH
1234
A. 1
B. 2
C. 3
D. 4
69. Which of the following structures is a Haworth projection?
C6H12O6
OH
OH
1234
A. 1
B. 2
C. 3
D. 4
70. Draw an example of a Fischer projection.
71. Circle the atoms which are pointing up in the following compound.
OO
OH
HO
HO
OH
72. Which of the following pairs of structures are resonance structures?
1234
O
O
N
N
A. 1
B. 2
C. 3
D. 4
73. Which of the following pairs of structures are resonance structures?
1234
O
O
N
N
A. 1
B. 2
C. 3
D. 4
HO
HO
OH
74. When do we use resonance structures?
75. Draw all valid resonance structures for the following anion.
S
O
O
O
76. Draw in the appropriate arrows for the following resonance pairs.
OO
77. In the following structure, the arrow indicates that electrons are moving to what
atom?
N
O O
A. C
B. O
C. H
D. N
78. In the following structure, the arrow indicates that electrons are moving to what
atom?
O
A. C
B. O
C. H
D. N
79. In the following structure, the arrow indicates that electrons are moving to what
atom?
N
A. C
B. O
C. H
D. N
80. Draw in the appropriate arrows for the following resonance pairs.
81. Draw in the appropriate arrows for the following resonance pairs.
82. Which of the following is a correct resonance structure of A?
N NH NH NH N
1234
A
A. 1
B. 2
C. 3
D. 4
83. Which of the following is a correct resonance structure of A?
O
N
1234
A
O
N
O
N
O
N
O
N
H
A. 1
B. 2
C. 3
D. 4
84. Which of the following is a correct resonance structure of A?
1234
A
A. 1
B. 2
C. 3
D. 4
85. Which of the following is a correct resonance structure of A?
1234
A
NNNN
A. 1
B. 2
C. 3
D. 4
86. Draw the resonance structure that is indicated by the following arrows.
N
O O
N
O O
+2
87. Draw the resonance structure that is indicated by the following arrows.
N
88. Draw the resonance structure that is indicated by the following arrows.
N
89. Draw the resonance structure that is indicated by the following arrows.
OH
90. Draw the resonance structure that is indicated by the following arrows.
O
91. Which of the following is a correct resonance structure of A?
1234
A
O
O
O
O
O
O O
O
OH
A. 1
B. 2
C. 3
D. 4
92. Which of the following is a correct resonance structure of A?
1234
A
NN N N N
A. 1
B. 2
C. 3
D. 4
93. Draw a resonance structure of A.
A
N
94. Which of the following is a correct resonance structure of A?
1234
A
Cl Cl Cl Cl F
A. 1
B. 2
C. 3
D. 4
95. Which of the following is a correct resonance structure of A?
1234
A
OO O O OH
A. 1
B. 2
C. 3
D. 4
96. Draw a resonance structure of A.
A
N
N
H
97. Which of the following is a correct resonance structure of A?
1234
A
A. 1
B. 2
C. 3
D. 4
98. Draw a resonance structure of A.
A
O
99. Is the following a valid resonance pair?
OH OH
A. Yes
B. No
100. Is the following a valid resonance pair?
OO
A. Yes
B. No
101. Is the following a valid resonance pair?
OH O
A. Yes
B. No
102. Which of the following resonance structures is the most significant?
NH NH NH
123
A. 1
B. 2
C. 3
103. Which of the following resonance structures is the most significant?
O O O
123
A. 1
B. 2
C. 3
104. Draw the resonance structures of the nitrite anion (NO2–) and indicate the most
important one.
105. Draw the resonance structures of the cyanide anion (CN–), indicating the most
important one.
106. Draw the resonance structures of the following anion.
N
107. Draw the resonance structures of the following cation and indicate the most
important one.
O
108. Which of the following resonance structures of dimethylaniline is the most
significant?
123
NNN
A. 1
B. 2
C. 3
109. The lone pair in the following compound is:
N
A. localized
B. delocalized
110. The lone pairs in the following compound are:
O
A. localized
B. delocalized
111. The indicated lone pair in the following compound is:
N
O
A. localized
B. delocalized
112. The indicated lone pair in the following compound is:
N
O
A. localized
B. delocalized
113. The indicated lone pair in the following compound is:
N
N
N
A. localized
B. delocalized
114. Draw in all localized lone pairs on the following structure.
N
N
115. Draw in all localized lone pairs on the following structure.
O
116. Draw in all localized lone pairs on the following structure.
OOH
OH
HO OH
OH
117. Draw in all delocalized lone pairs on the following structure.
OH
O
H
N