Section 10.1
Reactions and Equations
Practice Test
1.
What is the correct word equation for the chemical equation 2Fe(s) + 3Cl
2
(g) → 2FeCl
3
(s)?
a.
Aqueous iron and chlorine gas react to produce solid iron chlorate.
b.
Aqueous iron and chlorine gas react to produce aqueous iron chlorate.
c.
Solid iron and chlorine gas react to produce solid iron chlorate.
d.
Solid iron and chlorine gas react to produce solid iron chloride.
Hint
2.
Which of the following observations could be an indication of a chemical reaction of antimony?
a.
It is a solid at room temperature.
b.
It melts at 631°C.
c.
It expands upon freezing.
d.
It burns in an atmosphere of chlorine.
Hint
3.
In the following unbalanced chemical reaction, which components are classified as the reactants?
C
7
H
16
+ O
2
→ CO
2
+ H
2
O
a.
C
7
H
16
and O
2
b.
C
7
H
16
and CO
2
c.
C
7
H
16
and H
2
O
d.
CO
2
and H
2
O
Hint
4.
The _________ symbol separates the reactants from the products and means "to yield".
a.
+
b.
(s)
c.
→
d.
(g)
Hint
5.
In a chemical equation, the number written in front of the chemical formula is the _________.
a.
reactant
b.
product
c.
equation
d.
coefficient
Hint
6.
When there are exactly the same number and type of atoms on both sides of a chemical equation, the equation is ____________.
a.
balanced
b.
ionic
c.
synthetic
d.
decomposed
Hint
7.
A balanced chemical equation is a direct presentation of the ___________.
a.
law of conservation of momentum
b.
law of conservation of energy
c.
law of conservation of mass
d.
ideal gas law
Hint
8.
Balance the following equation. What is the coefficient for hydrogen fluoride?
SiO
2
+ HF → SiF
4
+ H
2
O
a.
1
b.
2
c.
3
d.
4
Hint
9.
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 two molecules of H
2
O.
d.
Two molecules of H
2
will produce one molecule of H
2
O.
Hint
