Basics Multiple Choice Review Questions for AP Chemistry

Review the following concepts if necessary:

• Units and Measurements for AP Chemistry
• The Structure of the Atom for AP Chemistry
• Periodic Table for AP Chemistry
• Oxidation Numbers for AP Chemistry
• Compounds Nomenclature for AP Chemistry
• Writing Formulas and Transition Metals Nomenclature for AP Chemistry

This is where you get a chance to practice your multiple-choice test-taking skills. Take it as a test, within the specified time frame. We have attempted to word the questions as closely as possible to the way the questions will be worded on the AP Exam.

Problems

Answer the following questions. You have 25 minutes. You may not use a calculator. You may use the periodic table in the back of the book.

1. In most of its compounds, this element exists as a monatomic cation.
   1. O
   2. Cl
   3. Na
   4. N
   5. I
2. This element may form a compound with the formula CaXO₄.
   1. Se
   2. Cl
   3. P
   4. Na
   5. He
3. Which of the following elements may occur in the greatest number of different oxidation states?
   1. C
   2. F
   3. O
   4. Ca
   5. Na
4. Choose the group that does not contain isotopes of the same element.



5. Which of the following groups has the species correctly listed in order of increasing radius?
   1. Mg²⁺, Ca²⁺, Ba²⁺
   2. K⁺, Na⁺, Li⁺
   3. Br^–, Cl^–, F^–
   4. Na, Mg, Al
   5. Fe, Fe²⁺, Fe³⁺
6. Which of the following elements has the lowest electronegativity?
   1. C
   2. K
   3. Al
   4. I
   5. F
7. Choose the ion with the largest ionic radius.
   1. F^–
   2. Al₃⁺
   3. K⁺
   4. O₂^–
   5. I^–
8. What is the name of the energy change when a gaseous atom, in the ground state, adds an electron?
   1. ionization energy
   2. sublimation energy
   3. atomization energy
   4. electron affinity
   5. lattice energy
9. The following ionization energies are reported for element X. (All the values are in kJ/mol.)



Based on the above information, the most likely identity of X is

1. Mg
2. Cl
3. Al
4. Na
5. Si
10. In general, as the atomic numbers increase within a period, the atomic radius
    1. first increases and then decreases
    2. increases
    3. first decreases and then increases
    4. does not change
    5. decreases

Choose one of the following elements for questions 11 and 12.

1. chlorine
2. gold
3. sodium
4. radon
5. radium
11. This element is a reactive gas.
12. This element is an unreactive metal.
13. Which of the following represents the correct formula for potassium trisoxalatoferrate(III)?
    1. P₃[Fe(C₂O₄)₃]
    2. K₃[Fe(C₂O₄)₃]
    3. KFe₃(C₂O₄)₃
    4. K₃FeO₃
    5. K₃[Fe₃(C₂O₄)₃]
14. Which of the following substances will produce a colorless aqueous solution?
    1. Zn(NO₃)₂
    2. CuSO₄
    3. K₂Cr₂O₇
    4. Co(NO₃)₂
    5. NiSO₄
15. This element is a liquid at room temperature.
    1. Hg
    2. Th
    3. Na
    4. Cl
    5. Co

Choose from the following elements for questions 16–18.

1. K
2. Ga
3. Fe
4. Mg
5. Al
16. This element is present in chlorophyll.
17. This element forms a protective oxide coating.
18. This element is used to improve the conductivity of germanium.
19. Which of the following aqueous solutions is blue?
    1. CuSO₄
    2. Cr₂(SO₄)₃
    3. NiSO₄
    4. ZnSO₄
    5. CoSO₄
20. In order to separate two substances by fractional crystallization, the two substances must differ in which of the following?
    1. solubility
    2. specific gravity
    3. vapor pressure
    4. viscosity
    5. freezing point
21. In a flame test, copper compounds impart which of the following colors to a flame?
    1. red
    2. orange
    3. blue to green
    4. violet
    5. yellow
22. What should you do if you spill sulfuric acid on the countertop?
    1. Neutralize the acid with vinegar.
    2. Sprinkle solid NaOH on the spill.
    3. Neutralize the acid with NaHCO₃ solution.
    4. Neutralize the acid with an Epsom salt (MgSO₄) solution.
    5. Use paper towels to soak up the acid.
23. Which of the following can be achieved by using a visible-light spectrophotometer?
    1. Detecting the presence of isolated double bonds.
    2. Finding the concentration of a KMnO₄ solution.
    3. Running a flame test to determine if Na⁺ or K⁺ is in a solution
    1. III only
    2. II only
    3. I only
    4. II and III
    5. I and II
24. You are given an aqueous solution of NaCl. The simplest method for the separation of NaCl from the solution is
    1. evaporation of the solution to dryness
    2. centrifuging the solution
    3. osmosis of the solution
    4. electrolysis of the solution
    5. filtration of the solution
25. The determination that atoms have small, dense nuclei is attributed to
    1. Rutherford
    2. Becquerel
    3. Einstein
    4. Dalton
    5. Bohr