Chemistry Practice test Book

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® GRE Chemistry Test Practice Book This practice book contains ® n one actual, full-length GRE Chemistry Test n test-taking strategies Become familiar with n test structure and content n test instructions and answering procedures Compare your practice test results with the performance of those who took the test at a GRE administration. www.ets.org/greTable of Contents Overview ..................................................................................................... .........3 Test Content ........................................................................................................3 Preparing for the Test ..........................................................................................4 Test-Taking Strategies ..........................................................................................4 What Your Scores Mean ............................................................................. .........5 Taking the Practice Test ......................................................................................5 Scoring the Practice Test ............................................................................. ........5 Evaluating Your Performance ...............................................................................6 Practice Test ............................................................................................... ..........7 Worksheet for Scoring the Practice Test ...........................................................51 Score Conversion Table .....................................................................................52 Answer Sheet ............................................................................................. ........53 ® Alt text is provided for 77 of the 130 GRE Chemistry Test questions in this practice book. However, because of the complexity and length of the verbal descriptions that the graphics associated with some of the questions would require, it is not practical to provide alt text for all 130 questions in this test. The statement “No alt text” is included for each of the 53 questions for which alt text is not provided. If you need additional accessible practice material for the GRE Chemistry Test, contact ETS Disability Services at 1-609-771-7780 or stassdets.org. Copyright © 2016 by Educational Testing Service. All rights reserved. ETS, the ETS logo, GRADUATE RECORD EXAMINATIONS and GRE are registered trademarks of Educational Testing Service (ETS) in the United States and other countries. MEASURING THE POWER OF LEARNING is a trademark of ETS. 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew I. ANALYTICAL CHEMISTRY — 15% Overview ® The GRE Chemistry Test consists of about 130 A. Data Acquisition and Use of Statistics — Errors, statistical considerations multiple-choice questions. Testing time is 2 hours and 50 minutes; there are no separately timed sections. B. Solutions and Standardization — A periodic table is printed in the test booklet as well Concentration terms, primary standards as a table of information (see pages 8 and 9) presenting C. Homogeneous Equilibria — Acid-base, various physical constants and a few conversion factors oxidation-reduction, complexometry among SI units. Whenever necessary, additional values of physical constants are printed with the text of the D. Heterogeneous Equilibria — Gravimetric question. Test questions are constructed to simplify analysis, solubility, precipitation mathematical manipulations. As a result, neither titrations, chemical separations calculators nor tables of logarithms are needed. If the E. Instrumental Methods — Electrochemical solution to a problem requires the use of logarithms, the methods, spectroscopic methods, necessary values are included with the question. chromatographic methods, thermal This publication provides a comprehensive methods, calibration of instruments overview of the GRE Chemistry Test to help you get F. Environmental Applications ready for test day. It is designed to help you: • Understand what is being tested G. Radiochemical Methods — Detectors, Applications • Gain familiarity with the question types • Review test-taking strategies II. INORGANIC CHEMISTRY — 25% • Understand scoring A. General Chemistry — Periodic trends, • Practice taking the test oxidation states, nuclear chemistry To learn more about the GRE Subject Tests, visit B. Ionic Substances — Lattice geometries, www.ets.org/gre. lattice energies, ionic radii and radius/ ratio effects C. Covalent Molecular Substances — Lewis Test Content diagrams, molecular point groups, VSEPR The content of the test emphasizes the four fields concept, valence bond description into which chemistry has been traditionally divided and hybridization, molecular orbital and some interrelationships; individual questions description, bond energies, covalent may test more than one field of chemistry. Some test and van der Waals radii of the elements, takers may associate a particular question with one intermolecular forces field, whereas other test takers may have encountered D. Metals and Semiconductors — Structure, the same material in a different field. For example, band theory, physical and chemical the knowledge necessary to answer some questions consequences of band theory classified as testing organic chemistry may well E. Concepts of Acids and Bases — Brønsted- have been acquired in analytical chemistry courses Lowry approaches, Lewis theory, solvent by some test takers. Consequently, the emphases of system approaches the four fields indicated in the following outline of F. Chemistry of the Main Group Elements material covered by the test should not be considered — Electronic structures, occurrences and definitive. recovery, physical and chemical properties of the elements and their compounds GRE Chemistry Test Practice Book Page 3 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ewG. Chemistry of the Transition Elements — IV . PHYSICAL CHEMISTRY — 30% Electronic structures, occurrences and A. Thermodynamics — First, second, and recovery, physical and chemical properties third laws, thermochemistry, ideal and real of the elements and their compounds, gases and solutions, Gibbs and Helmholtz coordination chemistry energy, chemical potential, chemical H. Special Topics — Organometallic equilibria, phase equilibria, colligative chemistry, catalysis, bioinorganic properties, statistical thermodynamics chemistry, applied solid-state chemistry, B. Quantum Chemistry and Applications to environmental chemistry Spectroscopy — Classical experiments, principles of quantum mechanics, atomic III. ORGANIC CHEMISTRY — 30% and molecular structure, molecular spectroscopy A. Structure, Bonding, and Nomenclature C. Dynamics — Experimental and theoretical — Lewis structures, orbital hybridization, chemical kinetics, solution and liquid configuration and stereochemical dynamics, photochemistry notation, conformational analysis, systematic IUPAC nomenclature, spectroscopy (IR and 1H and 13C NMR) Preparing for the Test B. Functional Groups — Preparation, GRE Subject Test questions are designed to measure reactions, and interconversions of alkanes, skills and knowledge gained over a long period of alkenes, alkynes, dienes, alkyl halides, time. Although you might increase your scores to alcohols, ethers, epoxides, sulfides, thiols, some extent through preparation a few weeks or aromatic compounds, aldehydes, ketones, months before you take the test, last-minute cramming carboxylic acids and their derivatives, is unlikely to be of further help. The following amines information may be helpful. C. Reaction Mechanisms — Nucleophilic displacements and addition, nucleophilic • A general review of your college courses is aromatic substitution, electrophilic probably the best preparation for the test. additions, electrophilic aromatic However, the test covers a broad range of subject substitutions, eliminations, Diels-Alder matter, and no one is expected to be familiar with and other cycloadditions the content of every question. D. Reactive Intermediates — Chemistry and • Become familiar with the types of questions in nature of carbocations, carbanions, free the GRE Chemistry Test, paying special attention radicals, carbenes, benzynes, enols to the directions. If you thoroughly understand E. Organometallics — Preparation and the directions before you take the test, you will reactions of Grignard and organolithium have more time during the test to focus on the reagents, lithium organocuprates, and questions themselves. other modern main group and transition metal reagents and catalysts F. Special Topics — Resonance, molecular Test-Taking Strategies orbital theory, catalysis, acid-base The questions in the practice test illustrate the types theory, carbon acidity, aromaticity, of multiple-choice questions in the test. When you antiaromaticity, macromolecules, lipids, take the actual test, you will mark your answers on a amino acids, peptides, carbohydrates, separate machine-scorable answer sheet. nucleic acids, terpenes, asymmetric synthesis, orbital symmetry, polymers 4 Page GRE Chemistry Test Practice Book 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ewFollowing are some general test-taking strategies essentially equal levels of performance regardless of you may want to consider. the test edition taken. GRE Chemistry Test total scores are reported on a • Read the test directions carefully, and work as 200 to 990 score scale in ten-point increments. rapidly as you can without being careless. For Test scores should be compared only with other each question, choose the best answer from the scores on the Chemistry Test. For example, a 750 on available options. the Chemistry Test is not equivalent to a 750 on the • All questions are of equal value; do not waste Biochemistry, Cell and Molecular Biology Test. time pondering individual questions you find extremely difcult or unfamiliar fi . • You may want to work through the test quite Taking the Practice Test rapidly, first answering only the questions about The Practice Test begins on page 7. The total time which you feel confident, then going back and that you should allow for this practice test is 2 hours answering questions that require more thought, and 50 minutes. An answer sheet is provided for you and concluding with the most difcult questions fi to mark your answers to the test questions. if there is time. It is best to take this Practice Test under timed • If you decide to change an answer, make sure conditions. Find a quiet place to take the test and you completely erase it and ll in the oval fi make sure you have a minimum of 2 hours and corresponding to your desired answer. 50 minutes available. • Questions for which you mark no answer or To simulate how the administration will be more than one answer are not counted in conducted at the test center, print the answer sheet scoring. (pages 53 and 54). Then go to page 50 and follow the instructions for completing the identification areas • Your score will be determined by subtracting of the answer sheet. When you are ready to begin the one-fourth the number of incorrect answers test, note the time and begin marking your answers from the number of correct answers. It is on the answer sheet. Stop working on the test when unlikely that pure guessing will raise your score; 2 hours and 50 minutes have elapsed. it may lower your score. However, if you have some knowledge of a question and are able to rule out one or more of the answer choices as Scoring the Practice Test incorrect, your chances of selecting the correct answer are improved, and answering such The worksheet on page 51 lists the correct answers questions will likely improve your score. to the questions. Columns are provided for you to mark whether you chose the correct (C) answer or • Record all answers on your answer sheet. an incorrect (I) answer to each question. Draw a line Answers recorded in your test book will not be across any question you omitted, because it is not counted. counted in the scoring. • Do not wait until the last ve minutes of a fi At the bottom of the page, enter the total number testing session to record answers on your answer correct and the total number incorrect. Divide the sheet. total incorrect by 4 and subtract the resulting number from the total correct. Then round the result to What Your Scores Mean the nearest whole number. This will give you your Raw Total score. Use the Total score conversion Your raw score — that is, the number of questions you table on page 52 to find the Scaled Total score that answered correctly minus one-fourth of the number corresponds to your Raw Total score. you answered incorrectly — is converted to the Example: Suppose you chose the correct answers scaled score that is reported. This conversion ensures to 80 questions and incorrect answers to 46. Dividing that a scaled score reported for any edition of a GRE 46 by 4 yields 11.5. Subtracting 11.5 from 80 equals Chemistry Test is comparable to the same scaled 68.5, which is rounded to 69. The raw score of 69 score earned on any other edition of the same test. corresponds to a scaled score of 680. Thus, equal scaled scores on a particular test indicate GRE Chemistry Test Practice Book Page 5 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ewIt is important to realize that the conditions Evaluating Your Performance under which you tested yourself were not exactly Now that you have scored your test, you may wish to the same as those you will encounter at a test center. compare your performance with the performance of It is impossible to predict how different test-taking others who took this test. conditions will affect test performance, and this is The data in the worksheet on page 51 are based only one factor that may account for differences on the performance of a sample of the test takers who between your practice test scores and your actual took the GRE Chemistry Test in November 2007. test scores. By comparing your performance on The numbers in the column labeled “P+” on the this practice test with the performance of other worksheet are indicative of the percentages of U.S. individuals who took GRE Chemistry Test, however, examinees who would answer each question correctly. you will be able to determine your strengths and You may use these numbers as a guide for evaluating weaknesses and can then plan a program of study to your performance on each test question. prepare yourself for taking the GRE Chemistry Test Interpretive data based on the scores earned under standard conditions. by test takers in a recent three-year period are available on the GRE website at www.ets.org/gre/subject/scores/understand. The interpretive data shows, for each scaled score, the percentage of test takers who received lower scores. To compare yourself with this population, look at the percentage next to the scaled score you earned on the practice test. Note that this interpretive data is updated annually and reported on GRE score reports. 6 Page GRE Chemistry Test Practice Book 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ewFORM GR0727 27 ® GRADUATE RECORD EXAMINATIONS CHEMISTRY TEST Do not break the seal until you are told to do so. The contents of this test are confidential. Disclosure or reproduction of any portion of it is prohibited. THIS TEST BOOK MUST NOT BE TAKEN FROM THE ROOM. Copyright © 2007 by Educational Testing Service. All rights reserved. GRE, GRADUATE RECORD EXAMINATIONS, ETS, EDUCATIONAL TESTING SERVICE and the ETS logos are registered trademarks of Educational Testing Service. 7 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew 8 -2­ 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew TABLE OF INFORMATION −31 Electron rest mass m = 9.11 × 10 kg e −27 Proton rest mass m = 1.672 × 10 kg p −27 Neutron rest mass m = 1.675 × 10 kg n −19 Magnitude of the electron charge e = 1.60 × 10 C −11 Bohr radius a = 5.29 × 10 m 0 23 −1 Avogadro constant N = 6.02 × 10 mol A −1 −1 R Gas constant = 8.314 J mol K −1 −1 • mol K = 0.0821 L atm −1 −1 • = 0.08314 L bar mol K −23 −1 Boltzmann constant k = 1.38 × 10 J K −34 • Planck constant h = 6.63 × 10 J s −34 •  = h/2 p = 1.05 × 10 J s 8 −1 10 −1 Speed of light c = 3.00 × 10 m s = 3.00 × 10 cm s 5 −2 1 bar pressure 1 bar = 1.000 × 10 N m 5 = 1.000 × 10 Pa = 0.987 atm 5 −2 1 atmosphere pressure 1 atm = 1.013 × 10 N m 5 = 1.013 × 10 Pa = 1.013 bar 4 −1 Faraday constant ; = 9.65 × 10 C mol −27 1 atomic mass unit (amu) 1 amu = 1.66 × 10 kg −19 1 electron volt (eV) 1 eV = 1.602 × 10 J −10 −1 Angstrom 1 Å = 10 m = 10 nm Volume of 1 mol of ideal = 22.4 L gas at 0 ° C, 1 atmosphere GO ON TO THE NEXT PAGE. 9 -2- 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew CHEMISTRY TEST Time—170 minutes 130 Questions 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 space on the answer sheet. Note: Solutions are aqueous unless otherwise specified. Throughout the test the following symbols have the specified definitions unless otherwise noted. T = M = temperature molar P = pressure m = molal V = volume L = liter(s) S = entropy mL = milliliter(s) H = enthalpy g = gram(s) U = internal energy kg = kilogram(s) G = Gibbs energy m = meter(s) A = Helmholtz energy nm = nanometer(s) R = gas constant atm = atmosphere(s) n = number of moles J = joule(s) s = seconds kJ = kilojoule(s) mol = mole(s) ppm = parts per million C = coulomb(s) Pa = Pascal(s) V = volt(s) Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of 10 any part of this page is illegal. GO ON TO THE NEXT PAGE. -4- 3. Of the following ions, which has the smallest CHEMISTRY TEST radius? Time—170 minutes + (A) K 130 Questions 2+ 1. Which of the following is the major product of the (B) Ca 3+ reaction shown above? (C) Sc Directions: Each of the questions or incomplete statements below is followed by five suggested answers or + (D) Rb completions. Select the one that is best in each case and then fill in the corresponding space on the answer sheet. (A) 2+ (E) Sr Note: Solutions are aqueous unless otherwise specified. 4. The molecular geometry of thionyl chloride, SOCl , is best described as Throughout the test the following symbols have the specified definitions unless otherwise noted. 2 (B) (A) trigonal planar T = M = temperature molar (B) T-shaped P = pressure m = molal (C) tetrahedral V = volume L = liter(s) (D) trigonal pyramidal S = entropy mL = milliliter(s) (E) linear H = enthalpy g = gram(s) (C) U = internal energy kg = kilogram(s) G = Gibbs energy m = meter(s) A = Helmholtz energy nm = nanometer(s) R = gas constant atm = atmosphere(s) (D) n = number of moles J = joule(s) s = seconds kJ = kilojoule(s) mol = mole(s) ppm = parts per million C = coulomb(s) Pa = Pascal(s) V = volt(s) (E) 5. Which of the following is true of the cell represented above? (A) Metal M is being oxidized. (B) Metal N is the reducing agent. 2+ (C) N ions are being oxidized. 2+ (D) M ions are being reduced. (E) The cell potential must be zero. 2. According to IUPAC rules, what is the name of the molecule shown above? (A) Benzyl propanoate (B) Phenyl propanoate (C) Phenyl butanoate (D) Propanoyl benzene (E) Propyl benzoate Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of Unauthorized copying or reuse of 11 any part of this page is illegal. any part of this page is illegal. GO ON TO THE NEXT PAGE. GO ON TO THE NEXT PAGE. -4- -5- 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew 2 7. What is the orb ital angular momentum quantum Ê ˆ an P + (V -nb ) = n RT number, l, of the electron that is most easily Á ˜ 2 Ë ¯ V removed when ground-state aluminum is ionized? (A) 3 6. Of the following substances, which is likely to (B) 2 have the largest value of the coefficient a in the (C) 1 van der Waals equation of state for real gases (D) 0 shown above? (E) 1/2 (A) H 2 (B) N 2 (C) CH 4 (D) NH 3 (E) CO 2 − − + 2+ − __ MnO + __ I + __ H U __ Mn + __ IO + __ H O 4 3 2 8. When the equation shown above is balanced, which of the following is true? − − (A) The I : IO ratio is 3:1. 3 − − The MnO : I ratio is 6:5. (B) 4 − 2+ (C) The MnO : Mn ratio is 3:1. 4 + − (D) The H : I ratio is 2:1. − − : IO ratio is 1:1. (E) The MnO 4 3 Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of 12 any part of this page is illegal. GO ON TO THE NEXT PAGE. -6- 2 7. What is the orbital angular momentum quantum Ê ˆ an P+ (V - nb) = nRT number, l, of the electron that is most easily Á ˜ 2 Ë ¯ V removed when ground-state aluminum is ionized? 9. Which of the following is the major organic product of the (A) 3 6. Of the following substances, which is likely to reaction shown above? (B) 2 have the largest value of the coefficient a in the (C) 1 (A) CH CH CH CH(OH) van der Waals equation of state for real gases 3 2 2 2 (D) 0 shown above? (B) CH CH CH CHO 3 2 2 (E) 1/2 (A) H 2 (C) CH CH CH CH OH 3 2 2 2 (B) N 2 (D) CH CH CH CH 3 2 2 3 (C) CH 4 (E) (D) NH 3 (E) CO 2 10. All of the following are aromatic EXCEPT − − + 2+ − __ MnO + __ I + __ H U __ Mn + __ IO + __ H O (A) 4 3 2 8. When the equation shown above is balanced, which of the following is true? − − (A) The I : IO ratio is 3:1. (B) 3 − − : I ratio is 6:5. (B) The MnO 4 − 2+ (C) The MnO : Mn ratio is 3:1. 4 11. In a DNA double-helix, guanine and cytosine (C) + − (D) The H : I ratio is 2:1. bases, shown above, are paired together by − − : IO ratio is 1:1. (E) The MnO 4 3 (A) covalent bonds (D) (B) hydrogen bonds (C) peptide bonds (D) hyperconjugation (E) π -stacking (E) Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of Unauthorized copying or reuse of 13 any part of this page is illegal. any part of this page is illegal. GO ON TO THE NEXT PAGE. GO ON TO THE NEXT PAGE. -6- -7- 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew 12. Of the following isomers, which is the most A B Initial Rate thermodynamically stable? − 4 − 1 0.10 M 0.30 M 1.5 × 10 M s (A) − 4 − 1 0.20 M 0.30 M 3.0 × 10 M s − 4 − 1 0.20 M 0.60 M 12.0 × 10 M s 14. For the reaction A + B → C + D carried out at constant temperature, the initial rates of (B) reaction given above were found experimentally. The rate law of this reaction, expressed as a (C) function of reactant concentrations, is (A) rate = k (A + B) (B) rate = k AB (D) 2 (C) rate = k A B 2 (D) rate = k AB 2 4 (E) rate = k A B (E) 15. Which of the following must be true about a binary liquid mixture that obeys Raoult’s law? I. The partial pressure of each component at equilibrium is proportional to its mole 13. Under constant current electrolysis, how many fraction in the liquid mixture. coulombs would be required to reduce 2 mol II. The volume of the mixture is equal to the 2+ of Cu to metallic copper? sum of the volumes of each component (� = 96,500 coulombs/mol) before mixing. III. Intermolecular interactions in the mixture (A) 2 are identical to intermolecular interactions (B) 48,250 in the pure components. (C) 96,500 (D) 193,000 (A) I only (E) 386,000 (B) III only (C) I and III only (D) II and III only (E) I, II, and III Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of 14 any part of this page is illegal. GO ON TO THE NEXT PAGE. -8- − 2− + 3+ 12. Of the following isomers, which is the most A B Initial Rate 3 Cl (aq) + 4 CrO (aq) + 23 H (aq) → 3 HClO (aq) + 4 Cr (aq) + 10 H O(l) 4 2 2 thermodynamically stable? − 4 − 1 0.10 M 0.30 M 1.5 × 10 M s − (A) 16. In the reaction shown above, Cl (aq) behaves as − 4 − 1 0.20 M 0.30 M 3.0 × 10 M s − 4 − 1 (A) an acid 0.20 M 0.60 M 12.0 × 10 M s (B) a base (C) a catalyst 14. For the reaction A + B → C + D carried (D) an oxidizing agent out at constant temperature, the initial rates of (B) (E) a reducing agent reaction given above were found experimentally. The rate law of this reaction, expressed as a (C) function of reactant concentrations, is (A) rate = k (A + B) 17. Elements with partially filled 4f or 5f orbitals (B) rate = k AB (D) include all of the following EXCEPT 2 (C) rate = k A B (A) Cu 2 (D) rate = k AB (B) Gd 2 4 (E) rate = k A B (C) Eu (D) Am (E) 19. In the compound shown above, which hydrogen 15. Which of the following must be true about a (E) Cm is most easily abstracted in a free radical binary liquid mixture that obeys Raoult’s law? bromination reaction? I. The partial pressure of each component (A) 1 O at equilibrium is proportional to its mole (B) 2 13. Under constant current electrolysis, how many fraction in the liquid mixture. coulombs would be required to reduce 2 mol CH CH CCH (C) 3 3 2 3 II. The volume of the mixture is equal to the 2+ (D) 4 of Cu to metallic copper? sum of the volumes of each component (E) 5 (� = 96,500 coulombs/mol) before mixing. H H III. Intermolecular interactions in the mixture (A) 2 A B are identical to intermolecular interactions (B) 48,250 in the pure components. (C) 96,500 18. Which of the following gives the multiplicities of 20. Which of the following is the major product of the (D) 193,000 the signals for the protons designated H and (A) I only A reaction shown above? (E) 386,000 1 (B) III only H in the H NMR spectrum of the compound B (A) (C) I and III only shown above? (D) II and III only (B) H H (E) I, II, and III A B (A) Singlet Singlet (C) (B) Triplet Doublet (C) Septet Singlet (D) (D) Quartet Triplet (E) Quartet Singlet (E) Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of Unauthorized copying or reuse of any part of this page is illegal. 15 any part of this page is illegal. GO ON TO THE NEXT PAGE. GO ON TO THE NEXT PAGE. -9- -8- 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew 21. Which of the following is always true of a 25. Infrared (IR) spectroscopy is useful for spontaneous process? determining certain aspects of the structure of organic molecules because (A) The process is exothermic. (B) The process does not involve any work. (A) all molecular bonds absorb IR (C) The entropy of the system increases. radiation (D) The internal energy of the system decreases. (B) IR peak intensities are related to (E) The total entropy of the system plus molecular mass surroundings increases. (C) most organic functional groups absorb in a characteristic region 22. The equation D H = D U + PD V is applicable of the IR spectrum (D) each element absorbs at a characteristic (A) always wavelength (B) only for constant pressure processes (E) vibrational transitions are correlated to (C) only for constant temperature processes spin-spin coupling (D) only for constant volume processes (E) only for constant entropy processes 26. Which of the following statements about nuclear binding energies is NOT true? 23. A system that consists of a sample of nitrogen gas behaving as an ideal gas is compressed at a (A) Binding energy per nucleon reaches a 56 constant temperature. Which of the following maximum for Fe. is true about w (work) and q (heat transfer) for (B) Nuclear binding energies have about the same this process? magnitude as chemical bond energies. (C) Nuclei have slightly less mass than the sum of w q their component nucleons. (D) The nuclei of heavy elements have more (A) 0 0 neutrons than protons in order to provide (B) 0 0 sufficient binding energy to hold the nuclei (C) 0 0 together. (D) 0 0 (E) When very light elements undergo exothermic (E) = 0 = 0 fusion reactions, the released energy arises from an increased binding energy per 24. What is the maximum number of phases that nucleon in the fusion products. can be at equilibrium with each other in a three- component mixture? (A) 2 (B) 3 (C) 4 (D) 5 (E) 6 Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of 16 any part of this page is illegal. GO ON TO THE NEXT PAGE. -10- 21. Which of the following is always true of a 25. Infrared (IR) spectroscopy is useful for 27. The dissociation energy for a hydrogen-bromine 30. Which of the following is classified spontaneous process? determining certain aspects of the structure bond is defined as the change in enthalpy, D H, as a conjugate acid-base pair? of organic molecules because for which of the following reactions? (A) The process is exothermic. (A) HCl / NaOH (B) The process does not involve any work. (A) all molecular bonds absorb IR + (A) 2 HBr(g) → H (g) + Br (l) 2 2 (B) H O / H O 3 2 (C) The entropy of the system increases. radiation + − (g) + Br (g) (B) HBr(g) → H (C) O / H O 2 2 (D) The internal energy of the system decreases. (B) IR peak intensities are related to + − (C) H(g) + Br(g) → HBr(g) (E) The total entropy of the system plus molecular mass (D) H / Cl (D) H (g) + Br (l) → 2 HBr(g) surroundings increases. (C) most organic functional groups (E) NaCl / NaOH 2 2 absorb in a characteristic region (E) HBr(g) → H(g) + Br(g) 22. The equation D H = D U + PD V is applicable of the IR spectrum 31. An impure sample of K O was analyzed by 2 (D) each element absorbs at a characteristic 28. A radioactive isotope, which is used in diagnostic precipitating the potassium as the insoluble (A) always wavelength imaging, has a half-life of 6.0 hours. If a quantity (B) only for constant pressure processes tetraphenyl borate salt, KB(C H ) . The 6 5 4 (E) vibrational transitions are correlated to of this isotope has an activity of 150 m Ci when it (C) only for constant temperature processes precipitate, KB(C H ) had a mass of 1.57 g. 6 5 4 spin-spin coupling is delivered to a hospital, how much activity will (D) only for constant volume processes The mass of K O in the original sample is 2 remain 24 hours after delivery? (E) only for constant entropy processes 26. Which of the following statements about nuclear (m Ci = microcuries) obtained from which of the following? (Molar binding energies is NOT true? masses: KB(C H ) = 358.3 g and K O = 94.2 g) 23. A system that consists of a sample of nitrogen 6 5 4 2 (A) 150 m Ci gas behaving as an ideal gas is compressed at a (A) Binding energy per nucleon reaches a (B) 38 m Ci (1.57)(94.2) 56 constant temperature. Which of the following maximum for Fe. (C) 19 m Ci (A) (358.3) is true about w (work) and q (heat transfer) for (B) Nuclear binding energies have about the same (D) 9.4 m Ci this process? magnitude as chemical bond energies. (E) 4.7 m Ci (358.3) (C) Nuclei have slightly less mass than the sum of (B) (1.57)(94.2) w q their component nucleons. 29. The rate, r, of a zero-order chemical reaction (D) The nuclei of heavy elements have more A → B can be expressed as which of the (A) 0 0 (1.57)(94.2) (C) neutrons than protons in order to provide following? (B) 0 0 2(358.3) sufficient binding energy to hold the nuclei (C) 0 0 (A) r = k lnA together. 2(1.57)(94.2) (D) 0 0 2 (D) (B) r = k A (E) When very light elements undergo exothermic (E) = 0 = 0 (358.3) fusion reactions, the released energy arises (C) r = k A 1/2 from an increased binding energy per (D) r = k A 2(358.3) 24. What is the maximum number of phases that (E) nucleon in the fusion products. (E) r = k (1.57)(94.2) can be at equilibrium with each other in a three- component mixture? (A) 2 (B) 3 (C) 4 (D) 5 (E) 6 Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of Unauthorized copying or reuse of 17 any part of this page is illegal. any part of this page is illegal. GO ON TO THE NEXT PAGE. GO ON TO THE NEXT PAGE. -10- -11- 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew 33. Of the following compounds, which has the fastest S 1 reaction rate with H O in acetone? N 2 (A) 32. Which of the following are the major products of the reaction shown above? (A) (B) (B) (C) (D) (C) (E) (D) (E) Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of 18 any part of this page is illegal. GO ON TO THE NEXT PAGE. -12- 33. Of the following compounds, which has the 34. Of the following, which compound is in 36. Considering 0.1 M aqueous solutions of each of fastest S 1 reaction rate with H O in acetone? equilibrium with the greatest percentage the following, which solution has the lowest pH ? N 2 of its enol isomer? (A) Na CO (A) 2 3 O (B) Na PO (A) 3 4 32. Which of the following are the major products (C) Na S of the reaction shown above? 2 H C H 3 (D) NaCl (A) (E) CH COONa (B) 3 O 37. Of the following compounds, which has H C CH 3 3 the lowest melting point? (B) (C) O (A) HCl (B) (B) AgCl (C) CaCl 2 (D) (C) O (D) CCl 4 (E) SnCl 4 O 38. Of the following solutions, which will have O (E) (D) the highest ionic strength? (Assume complete dissociation.) (C) (A) 0.050 M AlCl 3 O (B) 0.100 M NaCl (E) (C) 0.050 M CaCl 2 (D) 0.100 M HCl (E) 0.050 M Ca(NO ) 3 2 2 SO (g) U 2 SO (g) + O (g) 3 2 2 (D) 39. The K for the reaction shown above is 0.26 at P 1,000° C and 40.8 at 1,300° C. Which of the 35. In which of the following are the molecules following combinations of D H and D S are most shown above listed in order of increasing reactivity toward electrophilic aromatic plausible for this reaction at these temperatures? substitution? D H D S (A) 2 4 1 3 (B) 3 2 4 1 (A) = 0 = 0 (E) (C) 3 4 2 1 (B) 0 0 (D) 4 2 1 3 (C) 0 0 (E) 4 3 1 2 (D) 0 0 (E) 0 0 Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of Unauthorized copying or reuse of 19 any part of this page is illegal. any part of this page is illegal. GO ON TO THE NEXT PAGE. GO ON TO THE NEXT PAGE. -12- -13- 46752-78576 GRE CHEMISTRY Test Practice Book • Dr01 050509 ljg • reprint for service contract change 050609 ljg •edits dr01 051109 ljg • edits dr01 051109 mc • dr02 052609 ljg • preflight 6/5/09 mc • New Job 46752-114932 Drft01 7/12/16 ew • PDF Drft01 7/14/16 ew • Drft02 8/5/16 ew • PDF Drft02 8/11/16 ew k Ê ˆ 1 1 1 ZZZZX H (g) + I (g) 2 HI(g) v R - YZZZZ 2 2 H Á ˜ 2 2 k Ë ¯ n n - 1 1 2 40. At a given temperature, the forward rate 42. The Rydberg equation given above accurately predicts the UV-visible emission spectrum of the constant, k , for the one-step reaction shown 1 hydrogen atom. A form of the Rydberg equation − 7 − 1 − 1 above is 4 × 10 M s . Given that the may also be used to predict the UV-visible − 2 equilibrium constant is 1 × 10 , what is the emission for all of the following EXCEPT reverse rate constant, k ? − 1 − (A) hydride ion, H − 5 − 1 − 1 (B) deuterium atom, D (A) 8 × 10 M s (C) tritium atom, T − 5 − 1 − 1 (B) 4 × 10 M s + (D) helium cation, He − 7 − 1 − 1 (C) 4 × 10 M s 3+ (E) beryllium cation, Be − 9 − 1 − 1 (D) 8 × 10 M s − 9 − 1 − 1 (E) 4 × 10 M s pK = 2.95 a 1 pK = 6.79 a 2 − 1 − 1 CaCO (s) S° = 92.9 J K mol 3 − 1 − 1 CaO(s) S° = 39.8 J K mol 43. Phthalic acid, (COOH)C H (COOH), is a weak, 6 4 − 1 − 1 CO (g) 2 S° = 213.7 J K mol diprotic acid with dissociation constants above. The pH of an aqueous solution of potassium 41. Given the standard molar entropies listed − + acid phthalate, (COOH)C H (COO K ), is 6 4 above, the standard reaction entropy, DS ∞ , closest to − 1 − 1 in J K mol , for the decomposition of (A) 9.74 calcium carbonate into calcium oxide and (B) 7.00 carbon dioxide is (C) 6.79 (A) (92.9 + 39.8 + 213.7) (D) 4.87 (E) 2.95 (B) (− 92.9 − 39.8 − 213.7) (C) (− 92.9 − 39.8 + 213.7) 44. Which of the following is true for Br 2 (D) (39.8 + 213.7) at standard temperature and pressure? (E) (− 92.9 + 39.8 + 213.7) (A) It is a colorless gas. (B) It is a red-brown volatile liquid. (C) It is a colorless volatile liquid. (D) It is a yellow metallic solid. (E) It is a yellow insulating solid. Unauthorized copying or reuse of any part of this page is illegal. GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of 20 any part of this page is illegal. GO ON TO THE NEXT PAGE. -14- =