Chemical Reactions
Practice Test
1.
What is the correct name of Fe
2
O
3
?
a.
iron(I) oxide
b.
iron oxide
c.
iron(II) oxide
d.
iron(III) oxide
2.
In the combustion reaction of propane, C
3
H
8
, what are the products?
a.
C
3
H
8
and CO
2
b.
C
3
H
8
and O
2
c.
O
2
and H
2
O
d.
H
2
O and CO
2
3.
What are the products of the reaction between barium hydroxide and hydrochloric acid?
a.
chloric acid and barium
b.
barium chloride and barium hydride
c.
barium chloride and water
d.
barium hydroxide and water
4.
What is the name given to the energy required to separate one mole of the ions of an ionic compound?
a.
potential energy
b.
kinetic energy
c.
lattice energy
d.
heat energy
5.
What forms chemical bonds?
a.
inner-level electrons
b.
atomic nuclei
c.
noble gases
d.
valence electrons
6.
When a hydrogen atom is part of a molecular structure, it is always a ________ atom.
a.
1
–
b.
terminal
c.
ionic
d.
central
7.
When two or more atoms join together by sharing their outermost electrons, ________.
a.
an ionic compound is formed
b.
a solution is formed
c.
a mixture is formed
d.
a molecular compound is formed
8.
What is the complete ionic equation for the following chemical equation?
Cl
2
(aq) + Na
2
SO
4
(aq) → BaSO
4
(s) + 2NaCl(aq)
a.
Ba
2+
(aq) + 2Cl
-
(aq) + 2Na
+
(aq) + SO
4
2-
(aq) → 2Na
+
(aq) + 2Cl
-
(aq) + BaSO
4
(s)
b.
BaCl
2
(aq) + 2Na
+
(aq) + SO4
2-
(aq) → 2Na
+
(aq) + 2Cl
-
(aq) + BaSO
4
(s)
c.
Ba
2+
(aq) + Cl
-
(aq) + Na+(aq) + SO
4
2-
(aq) → Na+(aq) + Cl
-
(aq) + BaSO
4
(s)
d.
Ba
2+
(aq) + SO
4
2-
(aq) → BaSO
4
(s)
9.
Whichof the following is a mixture of elements that has metallic properties?
a.
a gas
b.
a pure metal
c.
a suspension
d.
an alloy
10.
When two or more Lewis structures can be used to represent a single molecule, these multiple structures are ______________.
a.
polar structures
b.
liquid structures
c.
resonance structures
d.
isomeric structures
11.
Side—on overlaps of atomic orbitals are also referred to as ___________.
a.
sigma bonds
b.
hydrogen bonds
c.
delta bonds
d.
pi bonds
12.
Which of these is the electron configuration of an atom most likely to lose an electron?
a.
1s
2
2s
2
2p
6
3s
2
3p
6
4s
1
b.
1s
2
2s
2
2p
6
c.
[He]2s
2
2p
5
d.
1s
2
2s
2
2p
6
3s
2
3p
5
13.
Which ion has the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
6
?
a.
Br
-
b.
Cl
-
c.
H
+
d.
F
-
14.
What is the correct name for HBr in an aqueous solution?
a.
hydrobromic acid
b.
bromous acid
c.
hydrogen bromide
d.
bromic acid
15.
Which of these is a spectator ion in the reaction 2NaOH(aq) + CuC
l2
→ 2NaCl(aq) + Cu(OH)
2
(s)?
a.
OH
b.
Cl and Na
c.
Cu
d.
Na
16.
What is the name of the aqueous solution of H
2
SO
4
?
a.
hydrogen persulfate
b.
sulfuric acid
c.
sulfurous acid
d.
hydrogen persulfide
17.
Consider the following balanced equation. Which one of the following statements is false?
a.
One molecule of O
2
will react with 2 molecules of H
2
.
b.
One molecule of O
2
will produce 2 molecules of H
2
O.
c.
Two molecules of H
2
will produce one molecule of H
2
O.
d.
Two molecules of H
2
will produce two molecules of H
2
O.
18.
Why are metals described as having a "sea of electrons"?
a.
The electrons are free to move between the atoms in a metal.
b.
The electrons move in waves.
c.
The electrons are fixed to a particular metal atom.
d.
The electrons are wet.
19.
What kind of ion is iodide (I
-
)?
a.
monatomic anion
b.
polyatomic anion
c.
monatomic cation
d.
polyatomic cation
20.
In a chemical equation, the number written in front of the chemical formula is the _________.
a.
reactant
b.
equation
c.
coefficient
d.
product
