Chemical Reactions
Practice Test
1.
What is the formula for the binary compound of aluminum and nitrogen?
SC.A.1.4.1
a.
AlN
b.
AlN
2
c.
Al
2
N
d.
Al
2
N
2
2.
Whichof the following is a mixture of elements that has metallic properties?
a.
a pure metal
b.
an alloy
c.
a gas
d.
a suspension
3.
Which of these is the electron configuration of an atom most likely to gain an electron?
a.
1s
2
2s
2
2p
6
b.
1s
2
2s
2
2p
6
3s
1
c.
1s
2
2s
2
2p
6
3s
2
3p
5
d.
1s
2
2s
2
2p
6
3s
2
3p
6
4s
1
4.
How many ions are produced when one unit of sodium phosphate Na
3
PO
4
dissolves in water?
SC.A.1.4.1
a.
3
b.
8
c.
2
d.
4
5.
Will the double displacement reaction NaOH + CaBr
2
occur? If so, what is the product of the reaction?
SC.B.1.4.2
a.
No
b.
Yes, Ca
OH
2
c.
Yes, Br
OH
2
d.
Yes, CaNa
6.
When two or more atoms join together by sharing their outermost electrons, ________.
SC.A.1.4.5
a.
an ionic compound is formed
b.
a solution is formed
c.
a mixture is formed
d.
a molecular compound is formed
7.
Which of the following single-replacement reactions will occur?
a.
Au
s
+ Cu
NO
3
2
aq
→
b.
Cl
2
g
+ HBr
aq
→
c.
Br
2
g
+ HF
aq
→
d.
Cu
s
+ ZnCl
2
aq
→
8.
Which ion has the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
6
?
a.
H
+
b.
Br
-
c.
Cl
-
d.
F
-
9.
How many lone pairs of electrons are present in a molecule of water?
SC.A.1.4.5
a.
3
b.
1
c.
4
d.
2
10.
Which of the following observations could be an indication of a chemical reaction of antimony?
SC.A.1.4.3
a.
It burns in an atmosphere of chlorine.
b.
It is a solid at room temperature.
c.
It expands upon freezing.
d.
It melts at 631°C.
11.
Na+
aq
is a _________________ in the following complete ionic equation.
H
+
aq
+ Cl
-
aq
+Na
+
aq
+OH
-
aq
→Na
+
aq
+Cl
-
aq
+H
2
O
l
a.
reacting compound
b.
reacting molecule
c.
participating ion
d.
spectator ion
12.
What is the chemical formula for dintrogen hexoxide?
a.
NO
3
b.
NO
2
c.
N
2
O
5
d.
N
2
O
6
13.
_____________ is the force that holds two atoms together.
SC.A.1.4.5
a.
A chemical bond
b.
Glue
c.
Fission
d.
Nuclear force
14.
In forming a molecular structure, each atom should have ________ electrons around it unless there is some specific reason why this cannot be achieved.
SC.A.1.4.5
a.
2
b.
6
c.
4
d.
8
15.
Which of the following is a correct description of a metallic property?
SC.A.2.4.5
a.
Metals gain electrons to form anions.
b.
Metals are brittle.
c.
Metals have a dull appearance.
d.
Metals are malleable.
16.
In a chemical equation, the number written in front of the chemical formula is the _________.
a.
coefficient
b.
equation
c.
product
d.
reactant
17.
Which of the following bond length represents the strongest bond?
a.
1.21 x 10
-10
m
b.
1.43 x 10
-10
m
c.
0.95 x 10
-10
m
d.
1.10 x 10
-10
m
18.
How are ionic bonds formed?
SC.A.1.4.5
a.
electrostatic forces between ions
b.
gain of electrons by atoms
c.
loss of electrons by atoms
d.
sharing of electrons between atoms
19.
The components of a chemical equation that are left after the spectator ions are removed are the ____________.
a.
reactants
b.
products
c.
participating ions
d.
spectator ions
20.
Which one of the following classifications of ions in the table contains an error?
Hydroxide
OH
-
monatomic
anion
carbonate
CO
3
2-
polyatomic
anion
ammonium
NH
4+
polyatomic
cation
magnesium
Mg
2+
monatomic
cation
a.
hydroxide
b.
magnesium
c.
ammonium
d.
carbonate
