PRACTICE TEST
Chapter 1,2, 4, and 25
MOORE
1. Which statement describes a chemical property of
silicon?
A)
B)
C)
D)
Silicon has a blue-gray color.
Silicon is a brittle solid at 20.°C.
Silicon melts at 1414°C.
Silicon reacts with fluorine.
2. At STP, which physical property of aluminum always
remains the same from sample to sample?
A) mass
C) length
B) density
D) volume
3. Given the balanced particle-diagram equation:
6. Which substance can be broken down by chemical
means?
A) CO
B) Ce
C) Ca
D) Cu
7. Which equation represents a physical change?
A)
B)
C)
D)
H2O(s) + 6.01 kJ ® H2O( )
2H2(g) + O 2(g) ® 2H2O(g) + 483.6 kJ
H2(g) + I 2(g) + 53.0 kJ ® 2HI(g)
N2(g) + 2O 2(g) + 66.4 kJ ® 2NO 2(g)
8. Which process is a chemical change?
A)
B)
C)
D)
melting of ice
boiling of water
subliming of ice
decomposing of water
9. Given the particle diagram representing four molecules
of a substance:
Which statement describes the type of change and the
chemical properties of the product and reactants?
A) The equation represents a physical change, with the
product and reactants having different chemical
properties.
B) The equation represents a physical change, with the
product and reactants having identical chemical
properties.
C) The equation represents a chemical change, with the
product and reactants having different chemical
properties.
D) The equation represents a chemical change, with the
product and reactants having identical chemical
properties.
Which particle diagram best represents this same
substance after a physical change has taken place?
A)
B)
C)
D)
4. Which statement describes a chemical property of
bromine?
A) Bromine is soluble in water.
B) Bromine has a reddish-brown color.
C) Bromine combines with aluminum to produce AlBr
3.
D) Bromine changes from a liquid to a gas at 332 K
and 1 atm.
5. Which substance can be decomposed by chemical
means?
A) aluminum
C) silicon
B) octane
D) xenon
10. Which set of procedures and observations indicates a
chemical change?
A) Ethanol is added to an empty beaker and the
ethanol eventually disappears.
B) A solid is gently heated in a crucible and the solid
slowly turns to liquid.
C) Large crystals are crushed with a mortar and pestle
and become powder.
D) A cool, shiny metal is added to water in a beaker
and rapid bubbling occurs.
11. An example of a physical property of an element is the
element’s ability to
A)
B)
C)
D)
react with an acid
react with oxygen
form a compound with chlorine
form an aqueous solution
18. Which formula represents a mixture?
A) C6H12O6( )
C) LiCl(aq)
B) C6H12O6(s)
D) LiCl(s)
19. Which particle diagram represents a mixture of an
element and a compound?
12. Which statement describes a chemical property that can
be used to distinguish between compound A and
compound B?
A) A is a blue solid, and B is a white solid.
B) A has a high melting point, and B has a low
melting point.
C) A dissolves in water, and B does not dissolve in
water.
D) A does not burn in air, and B does burn in air
13. Which process represents a chemical change?
A)
B)
C)
D)
melting of ice
corrosion of copper
evaporation of water
crystallization of sugar
14. Which is a chemical property of water?
A) It freezes.
C) It evaporates.
B) It decomposes.
D) It boils.
15. Which energy change occurs during the burning of
magnesium ribbon?
A)
B)
C)
D)
chemical energy
chemical energy
electrical energy
electrical energy
light energy
electrical energy
chemical energy
light energy
16. Powdered sulfur is yellow, and powdered iron is gray.
When powdered sulfur and powdered iron are mixed at
20ºC, the powdered iron
A) becomes yellow
C) remains ionic
B) becomes a liquid
D) remains magnetic
17. Two grams of potassium chloride are completely
dissolved in a sample of water in a beaker. This
solution is classified as
A)
B)
C)
D)
an element
a compound
a homogeneous mixture
a heterogeneous mixture
A)
B)
C)
D)
20. Bronze contains 90 to 95 percent copper and 5 to 10
percent tin. Because these percentages can vary, bronze
is classified as
A) a compound
C) a mixture
B) an element
D) a substance
21. A mixture of crystals of salt and sugar is added to water
and stirred until all solids have dissolved. Which
statement best describes the resulting mixture?
A) The mixture is homogeneous and can be separated
by filtration.
B) The mixture is homogeneous and cannot be
separated by filtration.
C) The mixture is heterogeneous and can be separated
by filtration.
D) The mixture is heterogeneous and cannot be
separated by filtration.
22. An aqueous solution of sodium chloride is best
classified as a
A)
B)
C)
D)
homogeneous compound
homogeneous mixture
heterogeneous compound
heterogeneous mixture
23. Given the diagrams X, Y, and Z below:
29. When a mixture of water, sand, and salt is filtered, what
passes through the filter paper?
A)
B)
C)
D)
water, only
water and sand, only
water and salt, only
water, sand, and salt
30. Which mixture can be separated by using the equipment
shown below?
Which diagram or diagrams represent a mixture of
elements A and B?
A) X, only
C) X and Y
B) Z, only
D) X and Z
24. Which of these terms refers to matter that could be
heterogeneous?
A) element
C) compound
B) mixture
D) solution
25. One similarity between all mixtures and compounds is
that both
A)
B)
C)
D)
are heterogeneous
are homogeneous
combine in a definite ratio
consist of two or more substances
26. Which material is a mixture?
A) water
C) methane
B) air
D) magnesium
27. When sample X is passed through a filter paper a white
residue, Y, remains on the paper and a clear liquid, Z,
passes through. When liquid Z is vaporized, another
white residue remains. Sample X is best classified as
A)
B)
C)
D)
an element
a compound
a heterogeneous mixture
a homogeneous mixture
28. At room temperature, a mixture of sand and water can
be separated by
A) ionization
C) filtration
B) combustion
D) sublimation
A)
B)
C)
D)
NaCl(aq) and SiO 2(s)
NaCl(aq) and C 6H12O6(aq)
CO 2(aq) and NaCl(aq)
CO 2(aq) and
C6H12O6(aq)
31. A student observed the following reaction:
AlCl 3(aq) + 3 NaOH(aq) ® Al(OH)3(s) + 3
NaCl(aq)
After the products were filtered, which substance
remained on the filter paper?
A) NaCl
C) AlCl 3
B) NaOH
D) Al(OH)3
32. The laboratory process of distillation does not involve
A)
B)
C)
D)
changing a liquid to vapor
changing a vapor to liquid
liquids with different boiling points
liquids with the same boiling points
33. Which physical property makes it possible to separate
the components of crude oil by means of distillation?
A) melting point
C) solubility
B) conductivity
D) boiling point
34. Which sample of matter can be separated into different
substances by physical means?
A) LiCl(aq)
C) NH 3(g)
B) LiCl(s)
D) NH 3( )
35. Petroleum can be separated by distillation because the
hydrocarbons in petroleum are
A)
B)
C)
D)
elements with identical boiling points
elements with different boiling points
compounds with identical boiling points
compounds with different boiling point
41. When an atom of the unstable isotope Na-24 decays, it
becomes an atom of Mg-24 because the Na-24 atom
spontaneously releases
A) an alpha particle
C) a neutron
B) a beta particle
D) a positron
42. Which statement best describes gamma radiation?
A)
B)
C)
D)
It has a mass of 1 and a charge of 1.
It has a mass of 0 and a charge of –1.
It has a mass of 0 and a charge of 0.
It has a mass of 4 and a charge of +2.
43. The graph below represents the decay of the radioactive
isotope iodione-131, which is used to diagnose thyroid
disorders:
36. Given the equation representing a nuclear reaction in
which X represents a nuclide:
Which nuclide is represented by X?
A)
C)
B)
D)
37. Which nuclear emission has the greatest mass and the
least penetrating power?
A) an alpha particle
C) a neutron
B) a beta particle
D) a positron
38. Which nuclear emission has the greatest mass?
A) alpha particle
C) gamma ray
B) beta particle
D) positron
C)
D)
40. Which of these types of nuclear radiation has the
greatest penetrating power?
A) alpha
C) neutron
B) 8 Days
D) 15 Days
A) 3.0 h B) 9.6 h C) 12 h
The particle represented by X is
B)
A) 24 Days
C) 16 Days
44. After decaying for 48 hours, of the original mass of
a radioisotope sample remains unchanged. What is the
half-life of this radioisotope?
39. Given the nuclear equation:
A)
Based on the graph, what is the half life of iodine-131?
B) beta
D) gamma
D) 24 h
45. An original sample of the radioisotope fluorine-21 had
a mass of 80.0 milligrams. Only 20.0 milligrams of this
original sample remain unchanged after 8.32 seconds.
What is the half-life of fluorine-21?
A) 1.04s B) 2.08s C) 4.16s D) 8.3s
46. The chart below shows the spontaneous nuclear decay
of U-238 to Th-234 to Pa-234 to U-234.
What is the correct order of nuclear decay modes for
the change from U-238 to U-234?
A)
B)
C)
D)
-
decay, decay,
- decay, - decay,
decay, decay,
decay, - decay,
-
decay
decay
- decay
- decay
47. Base your answer to the following question on The
diagram below represents a nuclear reactor. The arrows
indicate the direction of the flow of water.
Which structure is indicated by letter A?
A) turbine
C) control rod
B) moderator
D) internal shield
48. A student intended to make a salt solution with a
concentration of 10.0 grams of solute per liter of
solution. When the student’s solution was analyzed, it
was found to contain 8.90 grams of solute per liter of
solution. What was the percent error in the
concentration of the solution?
A) 1.10%
C) 11.0%
B) 8.90%
D) 18.9%
49. The diagram below shows the upper part of a laboratory
burner.
Which letter represents the hottest part of the burner
flame?
A) A
B) B
C) C
D) D
50. A Bunsen burner flame is sooty black and mixed with
an orange-yellow color. Which is the probable reason
for this condition?
A)
B)
C)
D)
No oxygen is mixing with the gas.
No gas is mixing with the oxygen.
Insufficient oxygen is mixing with the gas.
Insufficient gas is mixing with the oxygen.