lOMoARcPSD|363 091 83
1) Which of the following best describes the origin of carbon atoms?
a) The Big Bang
b) amino acids found on meteorites
c)
... [Show More] byproduct of chemical fusion in stars
d) gradual decay of radioactive isotopes of nitrogen
e) All of these choices.
Answer: C
Topic: General
Section: 1.1
Difficulty Level: Easy
2) Credit for the first synthesis of an organic compound from an inorganic precursor is usually
given to .
a) Berzelius
b) Arrhenius
c) Kekule
d) Wöhler
e) Lewis
Answer: D
Topic: General
Section: 1.1
Difficulty Level: Easy
lOMoARcPSD|363 091 83
3) The greatest degree of ionic character is anticipated for the bond between
a) H and C.
b) H and Cl.
c) C and Cl.
d) H and Br.
e) Br and Cl.
Answer: B
Topic: Atomic Orbitals, Periodic Trends, Electronegativity
Section: 1.3
Difficulty Level: Easy
4) Select the least electronegative element from the list below.
a) P
b) N
c) Mg
d) Si
e) K
Answer: E
Topic: Periodic Trends, Electronegativity
Section: 1.3
Difficulty Level: Easy
5) Select the most electronegative element from the list below.
a) H
b) O
c) N
d) B
e) C
Answer: B
Topic: Periodic Properties, Electronegativity
Section: 1.3
Difficulty Level: Easy
2
lOMoARcPSD|363 091 83
6) Which of these substances contain both covalent and ionic bonds?
a) NH4Cl
b) H2O2
c) CH4
d) HCN
e) H2S
Answer: A
Topic: Bonding
Section: 1.3
Difficulty Level: Medium
7) Which type of bonding is present in the compound CH3Li?
a) Ionic bonding
b) Covalent bonding
c) Hydrogen bonding
d) Ionic and covalent bonding
e) Ionic, covalent, and hydrogen bonding
Answer: D
Topic: Bonding
Section 1.3
Difficulty Level: Medium
3
lOMoARcPSD|363 091 83
8) Which of the following is the Lewis structure for CH3CH2O2H?
H H
H C C O O H
a) H H
H
H C
b) H
H
H
C O H
H
H C C O H
c) H H
H H
H C O
d) H
C O H
H
e) None of these choices.
Answer: A
Topic: Lewis Structures
Section: 1.4
Difficulty Level: Medium
9) In which of the following does the central atom have 2 pairs of non-bonding electrons?
a) O3
b) CO2
c) CO32–
d) NH4+
e) H2S
Answer: E
Topic: Lewis Structures
Section: 1.4
Difficulty Level: Medium
4
O
O
lOMoARcPSD|363 091 83
. . . . . .
10) Which is NOT a correct Lewis structure?
. .
H N
a) H
H
H C
b) H
. .
c) H O
. .
. .
H .O.
d)
.F. :
. .
F :
. .
. .
O H
. . . .
: O H
B
: O. . H
e) None of these choices.
Answer: A
Topic: Lewis Structures, Formal Charges
Section: 1.4
Difficulty Level: Medium
11) Which of these is a correct electron-dot representation of the nitrite ion, NO2–?
. . . . . . . . . . . . . .
: O : N : : O
. .
I
: O : : N : O :
. .
II
: O : : N : : O
. .
III
. . . . . . . . . . . .
: O : N : O : : O : : N : O
. . . . . . . .
IV V
a) I
b) II
c) III
d) IV
e) V
Answer: A
Topic: Lewis Structures, Formal Charges
Section: 1.4
Difficulty Level: Medium [Show Less]