Testbank5-Stereokemi - Chapter 5 1 MULTIPLE CHOICE...

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Unformatted text preview: Chapter 5 1 MULTIPLE CHOICE QUESTIONS Chapter 5: Stereochemistry Answers on page 23-24 Topic: Identifications and Comparisons 1. Which of the following is the enantiomer of the following substance? H CH 3 Br H H CH 3 H Br CH 3 H H Br CH 3 H Br H I II III A) I B) II C) III D) It does not have a non-superposable enantiomer. E) Both II and III 2. Which of the following molecules is achiral? C C C H 3 C H H CH 3 Br F Cl H CO 2 H OH OH H H HO 2 C CO 2 H CO 2 H OH H H HO Br CH 2 CH 3 CH 3 HO I II III IV V A) I B) II C) III D) IV E) V 3. Hexane and 3-methylpentane are examples of: A) enantiomers. B) stereoisomers. C) diastereomers. D) constitutional isomers. E) None of these 4. I and II are: H H 3 C Cl CH 2 CH 3 CH 2 CH 3 H H CH 2 Cl I II A) constitutional isomers. B) enantiomers. C) non-superposable mirror images. D) diastereomers. E) not isomeric. Chapter 5 2 5. Pairs of enantiomers are: CH 2 CH 2 CH 3 H 3 C Cl CH 3 CH 2 CH 2 CH 3 Cl CH 3 CH 3 I II H H 3 C Cl CH 2 CH 2 CH 3 CH 2 CH 2 CH 3 H H CH 2 Cl IV V CH 2 CH 2 CH 3 H 3 C Cl H III A) I, II and III, IV B) I, II C) III, IV D) IV, V E) None of the structures 6. Chiral molecules are represented by: C 2 H 5 Cl H 3 C CH 3 I C 2 H 5 CH 3 Cl CH 3 II C 2 H 5 Cl H 3 C H III H Cl H 3 C C 2 H 5 IV C 2 H 5 H H CH 2 Cl V A) I, II, III, IV and V B) I, II, III and IV C) I and II D) III and IV E) IV alone 7. The molecules shown are: H CH 3 OH H Br H H CH 3 OH H H Br A) constitutional isomers. B) enantiomers. C) diastereomers. D) identical. E) None of these Chapter 5 3 8. The molecules shown are: Cl CH 2 CH 3 H H 3 CH 2 C Cl H H CH 2 CH 3 CH 2 CH 3 Cl H Cl and are A) enantiomers. B) diastereomers. C) constitutional isomers. D) two conformations of the same molecule. E) not isomeric. 9. The molecules shown are: CH 3 H F H H CH 3 H F A) constitutional isomers. B) enantiomers. C) diastereomers. D) identical. E) None of these 10. The molecules below are: H F F H H F H F A) constitutional isomers. B) enantiomers. C) diastereomers. D) identical. E) stereoisomers. 11. The molecules shown are: CH 3 CH 3 H Cl Cl H H CH 3 CH 3 Cl H Cl A) enantiomers. B) diastereomers. C) constitutional isomers. D) two different conformations of the same molecule. E) not isomeric. Chapter 5 4 12. The molecules shown are: CH 3 OH H H OH H H CH 3 A) constitutional isomers. B) enantiomers. C) diastereomers. D) identical. E) None of these 13. The molecules shown are: F H H F A) constitutional isomers. B) enantiomers. C) diastereomers. D) identical. E) None of these 14. The molecules below are: H H CH 3 CH 3 H CH 3 H CH 3 A) structural isomers. B) enantiomers. C) diastereomers. D) identical. E) None of these 15. Cis-trans isomers are: A) diastereomers....
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This note was uploaded on 11/04/2010 for the course ORGANIC CH 210 taught by Professor Punjab during the Spring '10 term at Central Connecticut State University.

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Testbank5-Stereokemi - Chapter 5 1 MULTIPLE CHOICE...

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