Matter—Properties and Changes
Practice Test
1.
A heterogeneous mixture is poured through a piece of filter paper that is positioned over a beaker. What is the substance that is collected in the beaker?
a.
solid
b.
Not enough information is given.
c.
solution
d.
heterogeneous mixture
2.
Which of the following is not a chemical change?
a.
burning a piece of wood
b.
rusting of iron
c.
placing iron in hydrochloric acid and producing hydrogen gas
d.
freezing of water
3.
Which of the following methods of separating mixtures is best if the solution cannot be saturated and is temperature-sensitive?
a.
combustion
b.
chromatography
c.
crystallization
d.
distillation
4.
Fe
2
O
3
is a(n) _____________.
a.
compound
b.
heterogeneous mixture
c.
element
d.
homogeneous mixture
5.
In the following chemical reaction, how do you classify hydrogen and oxygen?
2H
2
+ O
2
→ 2H
2
O
a.
chemical properties
b.
physical changes
c.
reactants
d.
products
6.
How can the law of conservation of mass apply to a burning log, if all that remains of it is ash?
a.
The ash has the same mass as the log, although a large percentage of it blows away.
b.
The masses of the gases and water vapor released into the air by the combustion reaction plus the mass of ash equal the mass of the log before burning.
c.
The law of conservation of mass applies to substitution and displacement reactions, but not to combustion reactions.
d.
The law of conservation of mass applies to changes of state but not to chemical reactions.
7.
Which of the following is a heterogeneous mixture?
a.
sugar
b.
sugar in water
c.
samples of nitrogen and oxygen in the same container
d.
samples of argon and iron in the same container
8.
A technique that uses the differences in boiling point to separate homogeneous mixtures is _________.
a.
chromatography
b.
filtration
c.
distillation
d.
crystallization
9.
A form of matter that has a fixed shape and occupies a fixed volume is a _________.
a.
solid
b.
liquid
c.
plasma
d.
gas
10.
A solution of solids is a(n)___________.
a.
alloy
b.
heterogeneous mixture
c.
pure metal
d.
filtration
11.
How can you tell when the following reaction is balanced?
2Cu + O
2
→ 2CuO
a.
mass of the reactants = mass of products
b.
volume of reactants = volume of products
c.
volume of reactants = mass of products
d.
mass of reactants = volume of products
12.
Sucrose is composed of carbon, hydrogen, and oxygen. Which of the following data is not needed in order to determine the percent by mass of the three elements?
Analysis Data of Two Copper Compounds
Compound
% Cu
% Cl
Mass copper (g)100.0 g
of compound
Mass chlorine (g) 100.0 g
of compound
Mass ratio
mass Cu
————
mass Cl
I
64.20
35.80
64.20
35.80
1.793 g Cu/1 g Cl
II
47.27
52.73
47.27
52.73
0.8964 g Cu/1 g Cl
a.
mass of hydrogen in sucrose sample
b.
total mass of the sucrose sample
c.
mass of carbon in sucrose sample
d.
atomic numbers of the elements
13.
Periods are ___________ on the periodic table.
a.
right to left diagonals
b.
horizontal rows
c.
left to right diagonals
d.
vertical columns
14.
A vapor is a _________.
a.
condensed state
b.
liquid
c.
gas
d.
solid
15.
Properties that are dependent on the amount of substance present are ________.
a.
intensive properties
b.
external properties
c.
chemical properties
d.
extensive properties
16.
A material that cannot be broken down further by chemical means is a(n) ________.
a.
substance
b.
element
c.
mixture
d.
compound
17.
The statement, "Mass can neither be created nor destroyed" is the ____________.
a.
law of conservation of mass
b.
law of conservation of energy
c.
law of multiple proportions
d.
law of gravity
18.
How would you read the following chemical reaction?
2Cu + O
2
→ 2CuO
a.
copper(II) oxide yields oxygen and copper
b.
oxygen yields copper and copper(II) oxide
c.
copper yields oxygen and copper(II) oxide
d.
copper and oxygen yield copper(II) oxide
19.
Elements on the left side of the periodic table are _______.
a.
nonmetals
b.
metals
c.
metalloids
d.
compounds
20.
When one substance changes identity, it exhibits a(n) __________.
a.
chemical property
b.
intensive property
c.
physical property
d.
extensive property
