2230_exam1_practice_fa00

2230_exam1_practice_fa00 - St. John's University Chemistry...

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St. John’s University Department of Chemistry Chemistry 2230 10/11/00 Departmental Examination #1 Version 1 NAME________________________________ ID #________________ INSTRUCTOR'S NAME (Circle one): Dr. Graham Dr. Sarra THERE ARE EIGHT PAGES TO THIS EXAM INSTRUCTIONS 1. Write your name and ID # on this page and on the answer sheet. 2. Use the examination pages and the blank scrap page to work out your answers. 3. For each of the 25 questions, indicate the correct answer on the scantron with a # 2 pencil. Each question is worth four points. 4. You may use your molecular model set. NO OTHER MATERIALS ARE PERMITTED. 5. Hand in the examination questions and the scantron sheet. 6. You will have 90 minutes to complete the exam. HINT: Choose the ONE answer that BEST answers the question. PROPER CONDUCT DURING EXAMS: 1. Communication between students by any means is prohibited. 2. Possession of any unauthorized papers is prohibited. 3. No paging devices or cell phones are allowed. 4. All books, papers, and jackets should be placed in the front/sides of the room. 5. Violation of any of the above rules will result in a grade of zero. POTENTIALLY USEFUL INFORMATION Bond Dissociation Energies (Kcal/mol): Cl–Cl 58 H-Cl 103 CH 3 -Cl 84 CH 3 -H 104
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1) Which of the following are valid Lewis structures, including formal charge and resonance structures, for methyl isocyanate, CH 3 CNO? a) Y only b) Z only c) Both X and Z d) Both X and Y 2) What is the IUPAC name for the following compound? a) 5,7-diethyl-4,6-dimethyloctane b) 5-ethyl-3,4,6-trimethylnonane c) 6-ethyl-4,5,7-trimethyldecane d) 2,4-diethyl-3,5-dimethyloctane 3) Which of the compounds below are formed using BOTH ionic and covalent bonding? a) NaCl b) NH 4 Cl c) NH 3 d) Cl 2 4) Correctly identify the functional groups in the molecules shown below: a) I is an ester, II is an ether, and III is an amine b) I is an ether, II is an ester, and III is an amide c) I is an ether, II is a carboxylic acid, and III is an amine d) I is a ketone, II is an ester, and III is an amide
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2230_exam1_practice_fa00 - St. John's University Chemistry...

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