States of Matter
Practice Test
1.
The curved shape of water in a glass pipette is an example of _________.
a.
viscosity
b.
compression
c.
adhesion
d.
cohesion
2.
Which of the following solids is a metallic solid?
a.
iodine
b.
sulfur
c.
graphite
d.
nickel
3.
The components of a chemical equation that are left after the spectator ions are removed are the ____________.
a.
spectator ions
b.
products
c.
reactants
d.
participating ions
4.
Which molecule will not undergo hydrogen bonding?
a.
CH
4
b.
NH
3
c.
H
2
O
d.
HF
5.
In the reaction below, which of the components will precipitate?
NaCl(aq) + KBr(aq) → KCl(aq) + NaBr(aq)
a.
KBr(aq)
b.
KCl(aq)
c.
NaBr(aq)
d.
none of the components precipitate
6.
In a balloon filled with air (about 80% nitrogen and 20% oxygen), the pressure in the balloon is primarily ___________________________.
a.
zero
b.
the sum of the pressures exerted by nitrogen and oxygen
c.
the pressure exerted by oxygen
d.
the pressure exerted by nitrogen
7.
What relationship is described by the formula below? (mass of the element/mass of the compound) x 100
a.
mole ratio
b.
Avogadro’s number
c.
percent composition
d.
empirical formula
8.
What type of reaction occurs when potassium and chlorine gas produce potassium chloride?
Predicting Products of Chemical Reactions
Class of reaction
Reactants
Probable products
Synthesis
Two or more substances
One compound
Combustion
A metal and oxygen
A nonmetal and oxygen
A compound and oxygen
The oxide of the metal
The oxide of the nonmetal
Two or more oxides
Decomposition
One compound
Two or more elements and/or compounds
Single-replacement
A metal and a compound
A nonmetal and acompound
new compound and the replaced metal
A new compound and the replaced nonmetal
Double-replacement
Two compounds
Two different compounds,
one of which is often a solid, water, or a gas
a.
synthesis
b.
decomposition
c.
replacement
d.
combustion
9.
How many moles of hydrogen atoms are present in 2.0 moles of ammonia NH(
3
)?
a.
8.0 mol
b.
2.0 mol
c.
3.0 mol
d.
6.0 mol
10.
In a polar molecule, which atom will have the greatest partial negative charge?
a.
the most electronegative atom
b.
the least electronegative atom
c.
the smallest atom
d.
the largest atom
11.
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) →
12.
What is the percent composition of carbon dioxide CO
2
?
a.
50% C and 50% O
b.
33% C and 66% O
c.
73% C and 27% O
d.
27% C and 73% O
13.
Which scientist determined that almost all of an atom’s mass of is located in its nucleus?
a.
Thomson
b.
a. Dalton
c.
Democritus
d.
Rutherford
14.
What properties did Rutherford use in the design of the gold foil experiment?
a.
alpha particle's negative charge and random distribution of protons
b.
alpha particle's negative charge and gold foil's positive charge
c.
alpha particle's positive charge and electron's negative charge
d.
positively charged electrons distributed in a uniform negative charge
15.
Which of the following is not a fundamental particle in an atom?
a.
proton
b.
electron
c.
element
d.
neutron
16.
What is the smallest particle of an element that maintains the properties of the element?
a.
molecule
b.
atom
c.
mixture
d.
cation
17.
A mixture of oxygen, carbon dioxide and nitrogen has a total pressure of 0.78 atm. What is the partial pressure of O
2
, if the partial pressure of CO
2
is 0.46 atm and the partial pressure of N
2
is 0.08 atm?
a.
1.69 atm
b.
2.40 atm
c.
0.15 atm
d.
0.24 atm
18.
According to the phase diagram for CO
2
, what is the critical point for carbon dioxide?
a.
31
b.
-78
c.
-100
d.
-45
19.
What is the mass of 5.0 x 10
21
molecules of water?
a.
5.0 g
b.
0.15 g
c.
6.02 x 10
23
g
d.
8.3 x 10
-3
g
20.
The phase change that describes the direct conversion of a solid into a gas is _______.
a.
vaporization
b.
sublimation
c.
melting
d.
deposition
