CHAPTER 24 Organic Chemistry
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1 CHAPTER 24 rganic Chemistry 1. The general formula for alkenes is A. C n H 2n+2 B. C 2n H 2n C. C n H n+2 D. C n H 2n E. C n H 2n 2 2. The general formula of an alkane is A. C n H 2n B. C n H 2n+2 C. C n H 2n 2 D. C n H 2n+4 E. C n H 2n 4 3. Which one of the following formulas is that of an unsaturated hydrocarbon? A. CH 2 B. CH=CH 2 C. CH 2 H D. CH 2 E. H 2 C CH 2 \ / CH 2 4. Which of the following molecules is unsaturated? A. C 3 H 8 B. H C. C 5 H 10 D. CH 4 E. C 4 H 10
2 5. The formula CH 2 CH 2 CH 2 CH 2 CH=CH 2 represents A. an alkane. B. an alkyne. C. an alcohol. D. an unsaturated hydrocarbon. E. a CFC. 6. Which one of the following hydrocarbons does not have isomers? A. C 7 H 16 B. C 6 H 14 C. C 5 H 10 D. C 4 H 8 E. C 3 H 8 7. How many structural isomers are there of C 4 H 10? A. 4 B. 6 C. 2 D. 8 E Which of the following are structural isomers of C 6 H 14? I. CH 2 CH CH 2 II. CH CH 2 CH 2 CH 2 III. C CH IV. CH 2 H 3 C CH 2 CH 2 CH 2 A. I and II B. I and III C. II and III D. II and IV E. III and IV
3 9. Which of the following pairs are geometric isomers? A. CH 2 CH 2 and CH 2 CH 2 CH 2 H Cl B. CH CH and ClCH 2 CH 2 CH 2 CH 2 Cl Cl Cl C. CH 2 C=CH and C=C CH 2 Cl Cl Cl H H D. ClCH 2 C=C H and ClCH 2 C=C H H CH 2 Cl CH 2 Cl 10. The two molecules represented below are examples of C CH 2 CH 2 CH 2 C H A. isomers B. isotopes C. alcohols D. carboxylic acids E. unsaturated hydrocarbons 11. The two molecules represented below are examples of CH 2 CH 2 CH 2 CH 2 CH 2 H A. geometric isomers. B. structural isomers. C. optical isomers. D. stereoisomers. E. None of these. 12. Which of the following is an aromatic compound? A. C 2 H 2 B. C 6 H 12 C. C 6 H 4 Br 2 D. C 5 H 10 E. C 2 H 4 Br The octane rating of gasoline refers to its A. percentage C 8 H 18 by volume. B. radiation dose. C. alcohol level. D. ability to resist engine knocking. E. percentage of unsaturated hydrocarbons.
4 14. Which one of the following hydrocarbon chains would have the highest octane rating? A. C C C C B. C C C C C C C. C C C C C D. C C C C C C C C C 15. The compound that has a triple bond between one pair of carbon atoms is called a/an A. alkane. B. chlorofluorocarbon. C. alkyne. D. alkene. E. alcohol. 16. The alkane with six carbon atoms is called A. butane. B. hexane. C. heptane. D. butene. E. none of these.
5 17. Which is the systematic name for the compound represented below? CH 2 CH CH=CH 2 A. 2-ethylbutane B. 3-methylpentene C. 3-methyl-1-pentene D. 3-methyl-1-hexene E. 2-methylhexane 18. The systematic name for the compound represented below is CH 2 CH 2 CH 2 CH CH CH 2 CH 2 A. 4,5-diethylheptane B. 3-propyl-4-ethylhexane C. 3-ethyl-4-propylhexane D. 3-methyl-4-propylheptane E. 2-ethyl-4-propylhexane
6 19. Which is the systematic name for the compound represented below? A. 2,3-dibromopentane B. 1,2-dibromopentane C. 2,3-dibromopropane D. 1,2-propane dibromide E. 1,2-dibromopropane H H H H C C C Br H Br H 20. The correct structure for 2,3,3-trimethylpentane is A. CH C CH 2 B. C CH CH 2 C. CH CH CH D. CH CH CH 2 CH 2
7 21. The group of atoms that is responsible for the characteristic properties of a family of organic compounds is called a/an group. A. hydrocarbon B. functional C. ether D. enzyme E. polyatomic ion 22. rganic compounds with the general formula R R (where R is an alkyl group) are called A. alkenes. B. alcohols. C. ethers. D. aldehydes. E. organic acids. 23. Which one of the following represents a carboxyl functional group A. C = C D. C H B. C = E. H C. C H 24. Which one of the following represents an ester functional group? A. C = C C. C H B. C C D. C H
8 25. Which one of the following is the formula for a ketone? A. CH B. C. C D. CH E. HC CH 26. Wood alcohol is the common name for A. methanol. B. ethanol. C. propyl alcohol. D. ethylene. E. acetylene. 27. The name for the compound with the formula CH 2 CH 2 CH 2 H is A. propanol. B. propane. C. butanol. D. pentane. E. pentanol. Answer: C Difficulty: M 28. Which type of organic compound does not contain a carbonyl group? A. ethers B. carboxylic acids C. ketones D. aldehydes E. esters 29. Acetylene, C 2 H 2, the simplest alkyne, can be prepared from "inorganic" materials. Which reaction below is used to prepare acetylene in this way? A. 2C + H 2 C 2 H 2 B. C 2 H 4 C 2 H 2 + H 2 C. 2C + 2H 2 C 2 H 2 + H 2 2 D. CaC 2 + 2H 2 C 2 H 2 + Ca(H) 2
9 30. Which one of the following will result from the addition of HCl to CH=CH 2? A. Cl + CH 2 =CH 2 B. CHCl=CH 2 C. CHCl D. CH 2 CH 2 Cl E. None of these. 31. Which is the product of the reaction of one mole of HCl with one mole of 1- butyne? A. 1-chloro-1-butene B. 1-chloro-2-butene C. 2-chloro-1-butene D. ethyl chloride + acetylene 32. The reaction of an alcohol and a carboxylic acid yields A. a hydrocarbon. B. an ester. C. an ether. D. an aldehyde. E. a ketone. 33. The reaction of ethylene and water yields A. an aldehyde. B. an ester. C. an alcohol. D. an ether. E. an organic acid. 34. xidation of the 2-propanol will produce a/an A. aldehyde. B. amine. C. alkene. D. ketone. E. carboxylic acid.
10 35. Esters are synthesized from two classes of organic compounds. Those two types of compounds are A. acids and bases. B. amines and alcohols. C. alcohols and acids. D. amines and alkenes. E. alkenes and bases. 36. Which choice gives the structures of the reaction products when the ester below is hydrolyzed in acid solution? CHCH 2 C CH 2 A. CH 2 C H and CHCH 2 H B. CHCH 2 C H and CH 2 H C. CH CH 2 C H and H D. CH CH 2 C Cl and CH 2 H
11 37. The reaction of Cl 2 with CH 4 to produce methyl chloride is an example of a/an A. free radical reaction. B. addition reaction. C. reduction reaction. D. ester hydrolysis. E. polymerization. 38. Which of the following is a condensation reaction? A. addition of H 2 to a double bond B. linking an acid and an alcohol to make an ester and water C. addition of H 2 to an alkene D. oxidation of ethanol to acetaldehyde E. hydrolysis of an ester 39. Bromination of benzene (C 6 H 6 ), an aromatic compound, A. occurs by substitution rather than addition. B. occurs by addition rather than substitution. C. occurs more rapidly than bromination of a nonaromatic compound. D. results in formation of 1,2,3,4,5,6-hexabromocyclohexane. E. occurs in the absence of a catalyst. 40. Amines are A. organic bases that react with water to produce ammonia. B. organic acids that react with water to produce ammonia. C. organic bases that react with acids to form ammonium salts. D. organic acids that react with bases to form ammonium salts. E. None of the above. SHRT ANSWER QUESTINS 41. Which of the following are isomers? I. pentane II. 2-methylbutane III. 2,3-dimethylbutane IV. 2,2-dimethylpropane V. 1-hexene
12 TRUE-FALSE QUESTINS 42. The systematic name for the hydrocarbon with the following structural formula is 1-ethyl-2-methylbutane. Answer: F Difficulty: M CH 2 CH 2 C 43. The systematic name for the compound with the following structural formula is 4,5-dimethyl-2-hexene. CH CH CH=CH Answer: T Difficulty: M 44. The oxidation product of 1-propanol when using Cr as the oxidizing agent is acetone. Answer: F Difficulty: H 45. The reaction of hydrogen chloride gas with propene will yield 1- chloropropane as the main product. Answer: F Difficulty: H 52. Cycloalkanes have the general formula C n H 2n. Answer: T Difficulty: M
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