CHM 100 CHEMISTRY MAN & ENVIRONMENT Organic Chemistry Sample Test
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1 CHM 100 CHEMISTRY MAN & ENVIRONMENT Organic Chemistry Sample Test Multiple Choice: Identify the choice that best completes the statement or answers the question. 1. Which of these is the correct name for the structure below? a. butenol b. isobutanol c. 2 methyl 1 propanol d. isopropanol e. both C and D are correct 2. Which of these statements about alkanes is not correct? a. Alkanes are nonpolar. b. Alkanes have a general formula C n H 2n+ 2. c. Hydrogen is always at a terminal position. d. Alkanes with a carbon chain of four or less are liquids. e. Interior carbons will always be bound to two other carbons. 3. Which of these is the general formula for a carboxylic acid? a. RCOOH b. RCOR c. RCOH d. ROR e. RCOHR 4. Which of these statements about benzene rings is incorrect? a. Benzene is a particularly stable structure. b. Benzene rings are sometimes called aromatic rings. c. Benzene is a six membered ring with the formula C 6 H 6. d. The structure of benzene was first determined by Kekule. e. Benzene rings are composed of six carbons held together by six double bonds. 5. Which of these represents the general formula for alkynes? a. C n H 2n+2 b. C n H 2n 2 c. C n H 2n d. C 2n H n e. C n 2 H 2n
2 6. Which of these families is incorrectly matched to its general formula? a. Family carboxylic acids; General Formula RCOOH b. Family aldehydes; General Formula RCH c. Family esters; General Formula RCOOR d. Family ketones; General Formula RCOR e. Family alcohols; General Formula ROH 7. Which of these is the correct condensed structural formula for pentane? a. CH 3 CH 2 CH 3 b. CH 3 CH 2 CH 2 CH 3 c. CH 3 CH 2 =CH 2 CH 3 d. CH 3 CH 2 HC=CHCH 3 e. CH 3 CH 2 CH 2 CH 2 CH 3 8. Which of these is the correct name for CH 3 CH 2 HC=CHCH 3? a. pentene b. pentyne c. hexene d. hexyne e. butadiene 9. How many carbon atoms are there in a molecule of hexane? a. 4 b. 5 c. 6 d. 7 e Which of these substances are not organic compounds? I. alcohol II. aspirin III. gasoline IV. table salt a. I and II b. II and III c. II and IV d. II, III and IV e. IV only 11. Which of these alkanes would be liquids at room temperature? I. C 2 H 6 II. C 3 H 8 III. C 5 H 10 IV. C 6 H 14 V. CH 4 a. I and II b. I, II and III c. III and IV d. I, II and V e. I and V
3 12. Which of these is the correct name for CH 3 (CH 2 ) 7 CH 3? a. butene b. octane c. hexane d. nonane e. heptene 13. Which of these is not an alkane? a. C 2 H 6 b. C 3 H 8 c. C 5 H 10 d. C 6 H 14 e. CH Which of these elements is the basis for organic chemistry? a. hydrogen b. nitrogen c. sodium d. carbon e. chlorine 15. Which of these is not a subfamily of the hydrocarbon family? a. alkenes b. alkynes c. alkanes d. All of these are correct. e. A and B are not correct. 16. Which of these is the correct condensed structural formula for butane? a. CH 3 CH 2 CH 3 b. CH 3 CH 2 CH 2 CH 3 c. CH 3 CH 2 =CH 2 CH 3 d. CH 3 CH 2 HC=CHCH 3 e. CH 3 CH 2 CH 2 CH 2 CH Which of these is the correct name for the structural formula? a. ethane b. butane c. heptane d. hexane e. methane
4 18. Which of these is the correct name for the structure represented? a. 2 methylbutene b. 2 methyl 1 butene c. 2 methyl 2 butene d. 2,3 dimethyl 1 butene e. 2 methyl 3 ethyl 1 butene 19. Which of the following is true for a hydrocarbon? a. It consists of carbon and hydrogen atoms. b. It can form a ring structure. c. It is a good fuel for combustion reactions. d. It can contain double or triple bonds. e. All of the above. 20. Which of these is the correct name for the structure represented? a. 2 methylhexane b. 2 methylpropane c. 2,3 dimethylbutane d. 2,3 dimethylhexane e. 2 methyl 3 ethylbutane 21. How many structural isomers exist for pentane? a. 1 b. 2 c. 3 d. 4 e. 5
5 22. Which of these statements is not correct? a. Alkanes are saturated hydrocarbons. b. Alkenes have a general formula C n H 2n. c. Alkenes are hydrocarbon chains which contain a triple bond. d. Unsaturated hydrocarbons contain at least one multiple bond. e. The condensed structural formula of alkenes and alkynes include the multiple bond. 23. Which of these statements about alcohols is incorrect? a. Alcohols are polar in nature. b. Methanol is often used as a solvent. c. Isopropyl alcohol is used as a disinfectant. d. Ethanol is a component in alcoholic beverages. e. All of these statements are correct. 24. Molecules with the same chemical formula but different structural formulas are known as. a. isomers b. hydrocarbons c. empiricals d. stereocenters e. radicals 25. Which of these statements about chlorinated hydrocarbons is incorrect? a. Chlorinated hydrocarbons make good solvents. b. Chlorinated hydrocarbons are used as insecticides. c. Chlorinated hydrocarbons are relatively unstable and reactive. d. Chlorinated hydrocarbons decrease the flammability of hydrocarbons. e. Chlorinated hydrocarbons have been credited with depletion of the ozone. 26. Which of these is the generic symbol for the functional group of alcohols? a. R Cl b. R OH c. d. e.
6 27. Which of these is the correct name for the structure represented? a. 4 propyl 2 butyne b. 2,3 dimethylhexene c. 2,3 dimethylhexyne d. 1,2,3 trimethylhexyne e. 4,5 dimethyl 2 hexyne 28. Which of the following molecules types of compounds do not contain oxygen? a. alcohols b. aldehydes c. amines d. esters e. ketones 29. Which of these statements about alkanes is not correct? a. Alkanes are nonpolar. b. Alkanes are nonflammable. c. Carbon must always form four bonds. d. Alkanes have a general formula C n H 2n +2. e. Interior carbons will always be bound to two other carbons. 30. Which of these is the correct name for the structural formula? a. ethane b. butane c. propane d. hexane e. methane
7 31. Which of these is the correct name for CH 3 CH 2 C(CH)? a. pentene b. pentyne c. butene d. butyne e. butadiene 32. Which of these is the correct name for CH 3 (CH 2 ) 4 CH 3? a. butene b. octane c. hexane d. nonane e. heptene 33. How many hydrogen atoms are there in a molecule of hexane? a. 10 b. 11 c. 12 d. 13 e. 14 Other 34. The formula for propyne is (a) C 3 H 6 (b) C 3 H 4 (c) C 3 H 8 (d) C 3 H 3 (e) C 3 H Carbon is almost always (a) monovalent (b) divalent (c) trivalent (d) tetravalent (e) none of the above 36. Alkanes are often called (a) unsaturated hydrocarbons (b) saturated hydrocarbons (c) carbohydrates (d) saturated fats (e) all of the above 37. The simplest alkane is (a) monalkane (b) ethane (c) methane (d) propane (e) butane
8 38. When carbon tetrachloride reacts with hot water it produces phosgene (COCl 2 ). Phosgene was used in poison gas warfare in World War I. Based upon this chemistry, carbob tetrachloride is no longer used in (a) dry cleaning (b) chemical reactions (c) fire extinguishers (d) toilet bowl cleaners (e) none of the above 39. CFCs are most likely to be found in (a) pesticides (b) toasters (c) gasoline (d) refrigerators (e) all of the above 40. A bottle of rum is labeled as 80 proof. The percentage of ethanol by volume in this alcoholic beverage is (a) 8% (b) 40% (c) 80% (d) 160% (e) 16%
9
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