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Unformatted text preview: 1994 Advanced Placement Chemistry Exam Part I: Multiple Choice Note: For all questions involving solutions and/or chemical equations, assume that the system is in pure water and at room temperature unless otherwise stated. Directions: Each set of lettered choices below refers to the numbered questions or statements immediately following it. Select the one lettered choice that best answers each question or best fits each statement and then fill in the corresponding oval on the answer sheet. A choice may be used once, more than once, or not at all in each set. Questions 14 (A) Heisenberg uncertainty principle (B) Pauli exclusion principle (C) Hunds 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 57 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 atmosphere, 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 810 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 bonddissociation energy 9. Has a bond order of 2 10. Contains 1 sigma (s) and 2 pi (_) bonds Questions 1113 (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 Copyright 1994 by Educational Testing Service, Princeton, NJ 08541. All rights reserved. Reproductions of these examination questions by classroom teachers is permitted for face-to-face teaching purposes only. 1 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 1.0molar 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,...
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This note was uploaded on 08/27/2010 for the course CHEM 1070 taught by Professor Sticker during the Spring '08 term at Northwestern IA.
- Spring '08