Download Pre-Test: 2nd semester Final Exam Review File

Practice Test
Principles of Chemistry 2nd Semester Final Exam
Directions: Read each question carefully, chose the best answer.
Oxidation-Reduction
1. Is oxidation a physical or chemical process?
a. Physical
b. Chemical
c. Reduction
d. Half-reaction
2. How can oxidation be prevented?
a. Have to prevent oxygen from entering into the material or substance.
b. Painting cars
c. Using metal alloys for building.
d. All the above
3. Rusted iron, burning wood are examples of a chemical reaction. What is the fuel for
these reactions?
a. Oxygen
b. Fossil fuels
c. Gasoline
d. Wind farms
4. What occurs during reduction?
a. A substance loses electrons
b. A substance gains electrons
c. A substance becomes more negatively charged
d. Both b and c
5. What does iron give off when it rusts?
a. Heat
b. Light
c. nothing
d. Rust
6. When iron rust or during any chemical change, what happens to the atoms?
a. Atoms change by linking with other molecules to form compounds
b. Iron oxide is formed when iron is oxidized
c. A chemical reaction produces compounds.
d. All the above
7. What is an element?
a. Simplest form of a substance that cannot be broken down
b. Substance made from one or more atoms of the same atomic number
c. Hydrogen, helium, oxygen, chlorine, tungsten, sulfur, xenon, radon
d. All the above.
8. When magnesium burns, oxygen links up with the magnesium. The compound
magnesium oxide is formed. The burning of magnesium is an example of what type of
oxidation?
a. Slow oxidation
b. Combustion
c. Heat and light
d. Compound
9. What energy is given off when magnesium burns or any object that burns with a visiable
flame?
a. Electrical and mechanical
b. Hot and cold energy
c. Fusion energy
d. Heat and light energy
10. What type of change occurs when paper is burnt?
a. Physical
b. Chemical
c. Sound
d. Half-reaction
11. What is another term for combustion?
a. Reducing agent
b. Oxidizing agent
c. Rapid oxidation
d. Matter
12. Which process causes the removal of oxygen and the gain of electrons?
a. Oxidation
b. Reduction
c. Light energy
d. Oxygen
13. Which of the following are examples of slow oxidation?
a. Decay of food
b. Digestion and the release of energy
c. Rusting
d. All the above
14. Which of the following are examples rapid oxidation or combustion?
a. A house on fire.
b. Lighting a match
c. Cutting a potato
d. Both a and b.
15. What is always produced during the oxidation process?
a. Light
b. Heat
c. Combustion
d. Sound
16. The more active you are, the more oxidation takes place in your body. How can you tell
that exercise increases oxidation?
a. Your body releases heat causing your body to respond by sweating in order to cool
you off.
b. You run
c. Walk very fast
d. Our bodies do not carry out any oxidation processes
17. What is a compound?
a. Two or more elements chemically bonded
b. MgO, FeO, CaCO, NaF, NaN3
c. Already in its simplest form
d. Both a and b
18. Which of the following processes identifies with the release of heat?
a. Endothermic
b. Exothermic
c. Sound energy
d. Temperature
19. What is the gradual destruction of a metal or alloy as a result of chemical processes such
as oxidation or the action of the chemical?
a. Element
b. Compound
c. Corrosion
d. Heat
20. Which of these statements are true about slow oxidation?
a. There is no flame, heat is given off, but cannot be felt, oxygen links up with oxygen
very slowly
b. A flame is present, oxygen links up with other matter very rapidly
c. The oxidizing reaction of an organic compound in which a flame is present
d. Chemical reaction with a flame and a lot of heat
21. What does lemon juice do to the oxidation process?
a. Speeds up the process
b. Slows the oxidation process
c. Does nothing
d. Causes combustion
22. What is oxidation?
a. Oxygen
b. A reaction that removes one or more electrons
c. Heat
d. Flame
23.
Identify the subscript(s) in the following chemical formula: Na4 + O2
a. Na, O, 2
b. 4, 2, 2
c. Na, O, 4
d. None of the above
Na2O
24. Which side of the equation do you find the reactants?
a. Right side of a chemical equation
b. In the middle of a chemical equation
c. Left side of a chemical equation
d. All the above
25. How are the products formed?
a. During chemical reactions
b. They are never formed
c. Left side of the equation
d. None of the above
26. What does the subscript tell you about an element?
a. The number of atoms present in the element
b. A number that can be changed
c. It is the same as the coefficient
d. It is used to balance a chemical equation
27. According to the conservation of mass, what must be the same on both sides of the
equation in order for it to be balanced?
a. The coefficients must be the same
b. The subscripts must be the same
c. The number of atoms for each element must be the same
d. The order of the compounds must be in the same order on both sides of the
equation.
Energy
28. What is energy?
a. The ability to do work
b. The ability to make things move or go
c. Can change form
d. All the above
29. Which statement is NOT correct about energy?
a. Objects move because of energy
b. Energy is NOT matter
c. Energy has mass and takes up space
d. Can change from one form to another
30. Without energy we would have no electricity, light, cars, etc. How has energy made
modern civilization possible?
a. Energy of motion
b. We learned how to change energy from one form to another and then use it to do
work for us.
c. Modern civilization would have been possible without energy
d. None of the above
31. Which of the following are true about conservation of energy?
a. Energy cannot be made
b. Energy cannot be destroyed. It is never used up
c. Energy can change from one form to another
d. All the above
32. Why can’t kinetic energy ever be greater than potential energy?
a. Conservation of energy
b. The amount of energy within a system can only be as much as it is given
c. Kinetic energy is always higher
d. Both a and b
33. What is the form that batteries store energy in?
a. Kinetic
b. Mechanical
c. Sound
d. Potential
34. What is potential energy?
a. The energy of position, the higher an object the more energy it has
b. Motion energy
c. Stored energy
d. Both a and c
35. What happens to some of the energy when it changes forms?
a. It is lost as heat
b. It is absorbed by the environment
c. Both a and b.
d. None of the above
36. Which of the following conversions explain why you get warm when you exercise?
a. Chemical energy converts to heat energy
b. Potential energy is converted to heat energy
c. Light energy is converted to mechanical energy
d. Nuclear energy is converted into chemical energy
37. What are the seven forms of energy?
a. Chemical, mechanical, heat, sound, light, motion, and nuclear
b. Mechanical, heat, light, speed, velocity, potential and wind
c. Sound, light, heat, grasshopper pump, exercise, stored energy, motion
d. None of the above
38. What two forms of energy categorize the seven forms of energy?
a. Light and heat
b. Sound and motion
c. Potential and kinetic
d. Chemical and nuclear
39. What energy moves electrons through matter?
a. Mechanical
b. Heat
c. Nuclear
d. Electricity
40. Energy that is electromagnetic is considered to be what form of energy?
a. Nuclear
b. mechanical
c. Light
d. Chemical
41. The energy that is used to hold the particles of the nucleus together is what type of
energy?
a. Chemical
b. Radiant
c. Nuclear
d. Sound
42. What is the energy that vibrates air molecules by compressing air?
a. Sound
b. Light
c. Nuclear
d. Heat
43. The energy of moving things is defined as which of the following?
a. Heat
b. Sound
c. Chemical
d. Mechanical
44. Visible light, x-rays, gamma rays, radio waves, light bulb are examples of what type of
energy?
a. Heat
b. Light
c. Chemical
d. Nuclear
45. What are energy changes called?
a. Conversions
b. Changes
c. Conservation
d. Electrical
46. The following diagram represents which form of energy?
a.
b.
c.
d.
Kinetic energy
Potential energy
Wind energy
Light energy
Balancing Chemical Equations: Chose the letter that represents the correctly balanced
chemical equation. Use the space on your scantron to solve each equation or a sheet of scratch
paper.
47. _?_K + _?_Cl2
a.
_1_K
_?_KCl
+ _1_Cl2
_1_KCl
b. _2_K + __Cl2
_2_KCl
c.
_3_K
+ _2_Cl2
_2_KCl
d.
_5_K
+ _6_Cl2
_7_KCl
48. ___Mg + ___HCl
a. ___Mg + ___HCl
b. ___Mg + ___HCl
c. ___Mg + ___HCl
d. ___Mg + ___HCl
___ MgCl2 + ___H2
___ MgCl2 +
___ MgCl2 +
___ MgCl 2 +
___ MgCl2 +
49. ___NaCl
___Cl2
50. ___Ca
___Na +
+ ____O2
51. ___Li + ___F2
52. ___K + ___S
____CaO
___LiF
___K2S
___H2
___H2
___H2
___H2
53. ___Li + ____Cl2
____LiCl
True and False. Read questions 54-68 the following statements carefully. Select A for “true”
and B for “false.”
54. A chemical reaction causes a chemical change.
55. Oxidation is a physical process.
56. Combustion is a chemical reaction.
57. A chemical change makes new products.
58. Elements can be lost or gained in a chemical reaction.
59. A physical change makes new products.
60. The new substances made in a chemical reaction have new properties.
61. The boiling of water is an example of a chemical change
62. The electrolysis of water is an example of a chemical change.
63. Some physical changes involve taking in or giving off energy.
64. Slow oxidation gives off heat.
65. Slow oxidation gives off light.
66. Combustion is slow oxidation.
67. Food keeps fresher when it is wrapped.
68. Oxidation gives off oxygen
Naming Covalent Compounds: Read each question carefully. You will be given either the
chemical formula or the compound name. Remember the rules!
69. What is the compound name for ClO2?
a. Hexaboron silicide
b. Chlorine dioxide
c. Hydrogen iodide
d. Ammonia
70. What is the compound name for P4S5?
a. Tetraphosphorus pentasulfide
b. Disilicon hexabromide
c. Sulfur tetrachloride
d. Methane
71. What is the compound name for Si2Br6?
a. Tetraphosphorus pentasulfide
b. Disilicon hexabromide
c. Sulfur tetrachloride
d. Methane
72. What is the compound name for SCl4?
a. Tetraphosphorus pentasulfide
b. Disilicon hexabromide
c. Sulfur tetrachloride
d. Methane
73. What is the chemical formula for nitrogen trifluride?
a. B2Si
b. SeF6
c. SCl4
d. NF3
74. Identify the chemical formula for the following compound antimony tribromide.
a. SbBr3
b. SeF6
c. SCl4
d. NF3
Matching. Questions 75-79 please select the best select the best definition for each of the
following vocabulary words.
75. Decay
76. Combustion
a. Matter links up oxygen very slowly, heat
is given off but cannot be felt, no light. A
chemical process in which a substance
loses electrons.
77. Reduction
b. Chemical change in which electrons are
gained, either by the removal of oxygen,
the addition of hydrogen or the addition
of electrons
78. Oxidation
c. To spoil, breakdown
79. Corrosion
d. The oxidizing reaction of an organic
compound, in which heat is released. Also
known as rapid oxidation
e. Gradual destruction of a metal or alloy as a
result of a chemical process