Advanced Placement Chemistry

Advanced Placement Chemistry - Advanced Placement Chemistry...

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Unformatted text preview: Advanced Placement Chemistry 1994 Multiple Choice Questions Notes Note: For all questions involving solutions and/or chemical equations, assume that the system is in pure water at room temperature unless otherwise noted. Go to the answers Questions 1-4 (A) Heisenberg uncertainty principle (B) Pauli exclusion principle (C) Hund's rule (principle of maximum multiplicity) (D) Shielding effect (E) Wave nature of matter 1. Can be used to predict that a gaseous carbon atom in its ground state is paramagnetic 2. Explains the experimental phenomenon of electron diffraction 3. Indicates that an atomic orbital can hold no more than two electrons 4. Predicts that it is impossible to determine simultaneously the exact position and the exact velocity of an electron Questions 5-7 refer to the phase diagram below of a pure substance. (A) Sublimation (B) Condensation (C) Solvation (D) Fusion (E) Freezing 5. If the temperature increases from 10 C to 60 C at a constant pressure of 0.4 atmosphcre, which of the processes occurs? 6. If the temperature decreases from 110 C to 40 C at a constant pressure of 1.1 atmospheres, which of the processes occurs? 7. If the pressure increases from 0.5 to 1.5 atmospheres at a constant temperature of 50 C, which of the processes occurs? Questions 8-10 refer to the following diatomic species. (A) Li 2 (B) B 2 (C) N 2 (D) O 2 (E) F 2 8. Has the largest bond-dissociation energy 9. Has a bond order of 2 10. Contains 1 sigma (s) and 2 pi (p) bonds Questions 11-13 (A) Pb (B) Ca (C) Zn (D) As (E) Na 11. Utilized as a coating to protect Fe from corrosion 12. Is added to silicon to enhance its properties as a semiconductor 13. Utilized as a shield from sources of radiation 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 and then fill in the corresponding oval on the answer sheet. 14. Which of the following is lower for a 1.0-molar aqueous solution of any solute than it is for pure water? (A) pH (B) Vapor pressure (C) Freezing point (D) Electrical conductivity (E) Absorption of visible light 15. In a molecule in which the central atom exhibits sp 3 d 2 hybrid orbitals, the electron pairs are directed toward the corners of (A) a tetrahedron (B) a square-based pyramid (C) a trigonal bipyramid (D) a square (E) an octahedron 16. Commercial vinegar was titrated with NaOH solution to determine the content of acetic acid, HC 2 H 3 O 2 . For 20.0 milliliters of the vinegar 26.7 milliliters of 0.600-molar NaOH solution was required. What was the concentration of acetic acid in the vinegar if no other acid was present? (A) 1.60 M (B) 0.800 M (C) 0.600 M (D) 0.450 M (E) 0.200 M 17. Relatively slow rates of chemical reaction are associated with which of the following?...
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Advanced Placement Chemistry - Advanced Placement Chemistry...

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