Sample Questions: Chemistry
The following Chemistry sample questions don’t appear on an actual CLEP exam. They’re intended to give potential test-takers an indication of the format and difficulty level of the exam and to provide content for practice and review. For more sample questions and information about the test, see the CLEP Official Study Guide.
Directions
Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case.
Questions 1–3 refer to reactions represented by the following chemical equations.
- 2 KClO3(s) → 2 KCl(s) + 3 O2(g)
- Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
- Co2+(aq) + 6 NH3(aq) → [Co(NH3)6]2+(aq)
- H2O(l) + NH4+(aq) ↔ NH3(aq) + H3O+(aq)
2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(g)
1. A Brønsted–Lowry acid–base reaction
A. A
B. B
C. C
D. D
E. E
2. A decomposition reaction
A. A
B. B
C. C
D. D
E. E
3. A combustion reaction
A. A
B. B
C. C
D. D
E. E
4. The attractions between atoms within a molecule of NH3 are best characterized as
A. hydrogen bonds
B. ionic bonds
C. polar covalent bonds
D. London (dispersion) forces
E. ion–dipole forces
5. Which of the following is the ground-state electron configuration of a halide ion?
A. 1s2 2s2 2p4
B. 1s2 2s2 2p5
C. 1s2 2s2 2p6 3s2
D. 1s2 2s2 2p6 3s2 3p5
E. 1s2 2s2 2p6 3s2 3p6
6. What is the volume of a 1.5-mol sample of a gas at 35 °C and 2.0 atm?
A. 0.053 L
B. 0.29 L
C. 22 L
D. 19 L
E. 38 L
7. R(g) + 2 T(g) ↔ 2 X(g) + Z(g)
The reaction mixture represented above is at equilibrium at 298 K. The value of the equilibrium constant for the reaction is 16 at 298 K. If R(g), X(g), and Z(g) each have an equilibrium concentration of 2.0 M, what is the equilibrium concentration of T(g)?
A. 0.25 M
B. 0.50 M
C. 2.0 M
D. 4.0 M
E. 8.0 M
8. What is the pH of a solution made by diluting 1.00 mL of 1.0 M HCl with enough distilled water to make 1.00 L of solution?
A. 1.0
B. 2.0
C. 3.0
D. 4.0
E. 5.0
Answers to Sample Questions
1) D 2) A 3) E 4) C 5) E 6) D 7) B 8) D