ID: A MATCHING MULTIPLE CHOICE
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1 Chemistry-575 Semester-1 Review Practice Test (General review with an emphasis on the types of questions missed most frequently by students.) Answer Section MATCHING 1. ANS: B PTS: 1 DIF: L1 REF: p. 808 OBJ: Explain how an unstable nucleus releases energy. 2. ANS: A PTS: 1 DIF: L1 REF: p ANS: C PTS: 1 DIF: L1 REF: p ANS: A PTS: 1 DIF: L1 REF: p. 799 OBJ: Explain how an unstable nucleus releases energy. 5. ANS: B PTS: 1 DIF: L1 REF: p. 813 OBJ: Explain how an unstable nucleus releases energy Distinguish fission reactions from fusion reactions. STA: 12.F.5.a MULTIPLE CHOICE 6. ANS: D PTS: 1 DIF: L1 REF: p. 40 OBJ: Define physical property and list several common physical properties of substances. STA: 12.C.5.b 7. ANS: D PTS: 1 DIF: L1 REF: p. 45 OBJ: Distinguish between homogeneous and heterogeneous samples of matter. 8. ANS: B PTS: 1 DIF: L2 REF: p. 45 OBJ: Distinguish between homogeneous and heterogeneous samples of matter Describe two ways that components of mixtures can be separated. 9. ANS: D PTS: 1 DIF: L1 REF: p. 53 OBJ: Describe what happens during a chemical change. 10. ANS: A increases, so does the volume. The density always will be constant. 1
2 11. ANS: D increases, so does the volume. The density always will be constant. 12. ANS: C increases, so does the volume. The density always will be constant once you divide mass/volume. Density is a physical property so all samples of the same substance have THE SAME DENSITY! 13. ANS: B Percent Error = accepted value - experimental value x 100 accepted value % Error = 74% - 62% x 100 = 16% error 74% 14. ANS: C NEVER PLAY WITH THE PROTONS! Electrons are outside of the nucleus and are the only subatomic particle that can be lost or gained in chemistry. (Unless you have a nuclear reactor) If you change the protons, you change into a different element. If you change the electrons, you form an ion with a positive or negative charge. If you change the neutrons, you form a different isotope of the same element. 15. ANS: B 2
3 16. ANS: D 17. ANS: C 18. ANS: B PTS: 1 DIF: L2 REF: p ANS: A PTS: 1 DIF: L2 REF: p ANS: D A Atomic # = protons P Protons = electrons when neutral E Electrons M Mass # - A Atomic # = N Neutrons PTS: 1 DIF: L2 REF: p ANS: C Isotopes of the same element have to have the same atomic number and the same number of protons. Isotopes have different number of neutrons. PTS: 1 DIF: L2 REF: p ANS: C Density is found by the following formula: Density=Mass/Volume The equation can be manipulated so that Volume = Mass/Density in order to solve for Volume. 23. ANS: C PTS: 1 DIF: Bloom's Level 2 DOK Level 1 REF: Page 231 NAT: B.6 STA: 12.C.4a 3
4 24. ANS: B PTS: 1 DIF: Bloom's Level 1 DOK Level 1 REF: Page 231 NAT: B.6 STA: 12.C.4a 25. ANS: B PTS: 1 DIF: Bloom's Level 4 DOK Level ANS: C PTS: 1 DIF: Bloom's Level 4 DOK Level ANS: D PTS: 1 DIF: Bloom's Level 3 DOK Level ANS: D PTS: 1 DIF: Bloom's Level 4 DOK Level ANS: D PTS: 1 DIF: Bloom's Level 2 DOK Level 2 REF: Page 244 NAT: UCP.2 STA: 12.C.4b 30. ANS: A PTS: 1 DIF: Bloom's Level 4 DOK Level 2 REF: Page 247 NAT: UCP.2 STA: 12.C.4b 31. ANS: B PTS: 1 DIF: Bloom's Level 4 DOK Level ANS: A PTS: 1 DIF: Bloom's Level 2 DOK Level 1 REF: Page 85 NAT: B.1 B.2 STA: 12.C.5b 33. ANS: B PTS: 1 DIF: Bloom's Level 4 DOK Level ANS: A PTS: 1 DIF: Bloom's Level 4 DOK Level 1 REF: Page 96 NAT: B.1 B.2 STA: 12.C.5b 35. ANS: C PTS: 1 DIF: Bloom's Level 2 DOK Level 1 REF: Page 94 NAT: UCP.1 STA: 12.C.5b 36. ANS: A PTS: 1 DIF: Bloom's Level 2 DOK Level 1 REF: Page 94 NAT: UCP.1 STA: 12.C.5b 37. ANS: C PTS: 1 DIF: Bloom's Level 4 DOK Level ANS: B PTS: 1 DIF: Bloom's Level 2 DOK Level 2 REF: Page 99 NAT: UCP.2 B.2 STA: 12.C.4b 39. ANS: B PTS: 1 DIF: Bloom's Level 1 DOK Level 1 REF: Page 105 NAT: B.1 B.2 STA: 12.C.5b 40. ANS: B PTS: 1 DIF: Bloom's Level 4 DOK Level 4 REF: Page 154 NAT: B.1 B.2 STA: 12.C.4b 41. ANS: A PTS: 1 DIF: Bloom's Level 3 DOK Level 3 REF: Page 178 NAT: B.1 B.2 STA: 12.C.4b 42. ANS: C PTS: 1 DIF: Bloom's Level 3 DOK Level 2 REF: Page 157 NAT: UCP.2 B.2 STA: 12.C.4b 43. ANS: D PTS: 1 DIF: Bloom's Level 3 DOK Level 2 REF: Page 159 NAT: UCP.2 B.2 STA: 12.C.4b 44. ANS: C PTS: 1 DIF: L1 REF: p ANS: A PTS: 1 DIF: L2 REF: p. 801 STA: 12.C.5.a 12.D.4.b 46. ANS: C 4
5 47. ANS: B Independent variables: I choose. In this lab the student choose the size of the ice blocks. 48. ANS: C Dependent variables are almost always placed on the Y axis when graphing. 49. ANS: C Slope = change in Y / change in X Divide your answers out. Never leave a slope in fraction form. 50. ANS: D No explanation needed! 5
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