Chem 103
Chem 103 Exam 2 Questions with
Correct Answers 2026
The property that describes the ease with which an atom gives up an electron to
form a positive ion is
a. electron affinity
b. atomic number
c. electronegativity
d. ionization energy
e. none of the above -Correct Answer ✔-d. ionization energy
Predict the charge that an aluminum ion would have
a. 5-
b. 2+
c. 1-
d. 3+
e. 1+ -Correct Answer ✔-d. 3+
The oxidation number of Sulfur in Calcium sulfate, CaSO4, is
a. +2
b. +4
c. 0
d. +6
e. -2 -Correct Answer ✔-d. +6
Which of the following compounds is likely to have ionic bonds between the
atoms?
a. CaCl2
b. CH4
c. SO2
d. NBr3
e. all of these have covalent bonds -Correct Answer ✔-a. CaCl2
Chem 103
, Chem 103
Which is the correct formula for the ionic compound containing iron (III) ions and
oxide ions?
a. FeO2
b. Fe2O3
c. Fe3O2
d. FeO
e. Fe2O2 -Correct Answer ✔-b. Fe2O3
In a precipitation reaction the insoluble product can be identified by the symbol
a. (g)
b. (aq)
c. (l)
d. (s)
e. none of the above -Correct Answer ✔-d. (s)
Give the name for SnO
a. tin (IV) oxide
b. tin (III) oxide
c. tin (II) oxide
d. tin (I) oxide -Correct Answer ✔-c. tin (II) oxide
Which property is most closely associated with covalent molecules?
a. it has a very high melting point
b. it is composed of a metal and nonmetal
c. it is a gas at room temperature
d. it conducts electricity when dissolved in water
e. none of these -Correct Answer ✔-c. It is a gas at room temperature
The balanced equation for the reaction occurring when iron (III) oxide, a solid, is
reduced with pure carbon to produce carbon dioxide and molten iron is
a. 4Fe2O3(s) + 6C(s) --> 8Fe(l) + 6CO2(g)
b. 2FeO3(s) + 3C(s) --> 2Fe(l) + 3CO2(g)
c. 2Fe3O(s) + C(s) --> 6Fe(l) + CO2(g)
d. 2FeO(s) + C(s) --> 2Fe(l) + CO2(g)
Chem 103
Chem 103 Exam 2 Questions with
Correct Answers 2026
The property that describes the ease with which an atom gives up an electron to
form a positive ion is
a. electron affinity
b. atomic number
c. electronegativity
d. ionization energy
e. none of the above -Correct Answer ✔-d. ionization energy
Predict the charge that an aluminum ion would have
a. 5-
b. 2+
c. 1-
d. 3+
e. 1+ -Correct Answer ✔-d. 3+
The oxidation number of Sulfur in Calcium sulfate, CaSO4, is
a. +2
b. +4
c. 0
d. +6
e. -2 -Correct Answer ✔-d. +6
Which of the following compounds is likely to have ionic bonds between the
atoms?
a. CaCl2
b. CH4
c. SO2
d. NBr3
e. all of these have covalent bonds -Correct Answer ✔-a. CaCl2
Chem 103
, Chem 103
Which is the correct formula for the ionic compound containing iron (III) ions and
oxide ions?
a. FeO2
b. Fe2O3
c. Fe3O2
d. FeO
e. Fe2O2 -Correct Answer ✔-b. Fe2O3
In a precipitation reaction the insoluble product can be identified by the symbol
a. (g)
b. (aq)
c. (l)
d. (s)
e. none of the above -Correct Answer ✔-d. (s)
Give the name for SnO
a. tin (IV) oxide
b. tin (III) oxide
c. tin (II) oxide
d. tin (I) oxide -Correct Answer ✔-c. tin (II) oxide
Which property is most closely associated with covalent molecules?
a. it has a very high melting point
b. it is composed of a metal and nonmetal
c. it is a gas at room temperature
d. it conducts electricity when dissolved in water
e. none of these -Correct Answer ✔-c. It is a gas at room temperature
The balanced equation for the reaction occurring when iron (III) oxide, a solid, is
reduced with pure carbon to produce carbon dioxide and molten iron is
a. 4Fe2O3(s) + 6C(s) --> 8Fe(l) + 6CO2(g)
b. 2FeO3(s) + 3C(s) --> 2Fe(l) + 3CO2(g)
c. 2Fe3O(s) + C(s) --> 6Fe(l) + CO2(g)
d. 2FeO(s) + C(s) --> 2Fe(l) + CO2(g)
Chem 103
