Organic Chemistry I: Formulas, Names, and PropertiesAlkanes and Cycloalkanes d 1. What is the molecular formula for heptane? (a) C7H14 e 2. (b) C7H12 (c) C9H18 (d) C7H16 (e) C9H20 In the homologous series of alkanes, each member differs from the next member by a _____ group. (a) CH (b) CH3 (c) CnH2n+2 (d) C2H5 (e) CH2 c 3. What is the hybridization of the two carbons in ethane? (a) sp (b) sp2 (c) sp3 (d) sp3d (e) sp3d2 c 4. How many possible constitutional isomers of C6H14 exist? (a) 6 (b) 3 (c) 5 (d) 4 (e) 9 d 5. Which one of the following formulas could represent a cycloalkane? (a) C2H6 (b) C3H8 (c) C4H10 (d) C6H12 (e) C7H16 c 6. Which one of the following statements is false? (a) (b) (c) (d) (e) Unsubstituted saturated hydrocarbons may contain even or odd numbers of carbon atoms. The boiling points of normal alkanes increase with increasing molecular weight. Most hydrocarbons are polar. The carbon atoms in saturated hydrocarbons are best described as sp3 hybridized. An alkyl group may be represented, in general, as CnH2n+1. 8.9-trimethyldecane (b) 7-ethyl-2.8-trimethylnonane (e) 4-ethyl-7.4-trimethyldecane (d) 4-ethyl-7.6-trimethyl-3-propyloctane b 9.5-dimethyl-5-propylheptane (e) 3.4. Which of the following structural formulas contains an error? CH3 CH2 (a) CH3 CH2 CH CH CH3 CH3 CH2 CH3 (b) CH3 CH2 CH2 CH CH3 CH2 CH3 (c) CH3 CH2 CH CH2 CH CH3 CH3 CH3 (d) CH3 CH CH2 CH2 CH CH3 CH3 CH3 (e) CH3 CH CH CH2 CH2 CH3 CH3 CH3 Naming Saturated Hydrocarbons b 8.9.2.9.9-trimethylnonane .6-trimethyl-6-propyloctane (c) 2-ethyl-4.2. The correct IUPAC name for the compound shown below is _____.5-dimethylocttane The correct IUPAC name for the compound shown below is _____.b*7. CH3 CH2 CH2 CH3 CH2 CH CH2 CH2 CH CH3 CH2 CH3 C CH3 CH3 (a) 2.6-trimethylnonane (d) 2.5. (b) 6-ethyl-3. CH3 CH 3 H3C CH CH2 CH C CH 2 CH 3 CH 2 CH 3 CH 2 CH 2 CH 3 (a) 3.5-diethyl-4.4-trimethyl-7-propylnonane (c) 3-propyl-6.5. 4-dimethylhexane (b) 3-ethyl-1.4-dimethylcyclohexane .5-tetramethylpentane c 12.3.1.2.5.a 10.4-dimethylcyclohexane (d) 2-ethyl-1. What is the correct condensed formula for 2.2.1.1-dimethylpentane (b) 2.3.4. CH3 CH2CH3 CH3 (a) 2-ethyl-1.4-dimethylhexane? CH3 CH2 (a) CH3 CH2 CH CH CH3 CH3 CH2 CH3 (b) CH3 CH2 CH CH CH3 CH2 CH3 (c) CH3 CH2 CH CH2 CH CH3 CH3 CH3 (d) CH3 CH CH2 CH2 CH CH3 CH3 CH3 (e) CH3 CH CH CH2 CH2 CH3 CH3 CH3 c 11. Give the correct IUPAC name for the compound with the following structural formula.5-dimethylcyclohexane (e) cyclic-2-ethyl-1.5-dimethylpentane What is the correct IUPAC name for (CH3)2CH(CH2)3CH3? (a) heptane (d) 1. What is the structure for 3.3-hexamethylpropane (d) 1.4-dimethylcyclopentane (c) 1-ethyl-2. What is the correct IUPAC name for (CH3)3CCH2C(CH3)3? (a) nonane (c) 2.4-trimethylpentane ? (a) (CH3)3CCH2C(CH3)3 (d) (CH3)2CHCH(CH3)2 (b) (CH3)3C(CH2)2CH3 (e) (CH3)3CCH2CH(CH3)2 (c) (CH3)3CHCH2CH(CH3)2 d 14. (b) 1.4-tetramethylpentane (e) 1.2-dimethylpentane (e) hexane (c) 2-methylhexane e 13.1. (a) alkene (d) methylene d 17. Give the correct IUPAC name for the following compound. Which of the following is the correct structure for 3-cyclopropyl-2-methylpentane? CH 3 CH3 CH2 CH CH CH3 CH3 (a) CH3 CH2 CH CH CH3 CH 2 CH3 CH 2 (b) CH 2 CH 2 CH 3 (c) CH3 CH 3 (d) CH 3 CH 3 CH CH CH 2 CH3 (e) Alkenes a 16. A hydrocarbon containing one double bond per molecule is called a(an) _____. Which of the following hydrocarbons can exist as cis-trans isomers? (a) 1-butene (d) methylpropene (b) 2-butene (e) 2-methyl-1-butene (c) 2-methyl-2-butene d 19.4-dimethyl-3-pentene (c) 3.3-dimethyl-2-pentene . CH3CH2 C CH3 C CH3 CH3 (a) 3.a 15. (b) alkyne (e) saturated hydrocarbon (c) alkane Which one of the following formulas could represent an unsaturated hydrocarbon? (a) C2H6 (b) C3H8 (c) C4H10 (d) C6H12 (e) C7H16 b 18.4-dimethyl-trans-3-pentene (b) 3.4-dimethyl-cis-3-pentene (d) 2. (e) 2-ethyl-3-methyl-2-butene Give the correct IUPAC name for the following compound. Give the correct IUPAC name for the following compound. Which of the following is the correct formula for 2-methyl-1-butene? CH3 CH2 CH CH CH3 CH3 CH3 C CH2 (a) CH3 CH2 C CH3 CH C CH2 CH3 (b) (c) CH3 (d) c 22. (c) The lubricating oil fraction of petroleum consists of higher molecular weight components than the gasoline fraction. CH3 (e) none of these The formula for cyclohexene is _____. CH3 (a) 3-methylcyclopentene (c) 1-methyl-2-cyclopentene (e) 3-methyl-cis-cyclopentene Petroleum d 24. (b) 5-methyl-1-cyclopentene (d) 5-methylcyclohexene Which one of the following statements regarding petroleum products is false? (a) Each oil field produces petroleum with its own set of characteristics. . CH3 C CH3 CH2 C CH2 CH3 H (a) 2-ethyl-2-pentene (b) 2-ethyl-trans-2-pentene (c) 3-methyl-cis-3-hexene (d) 3-methyl-trans-3-hexene (e) 3-methyl-3-hexene a 21.c 20. (a) C6H14 (b) C6H12 (c) C6H10 (d) C6H9 (e) C6H6 a 23. (b) Paraffin and asphalt are among the highest boiling (melting) fractions of petroleum. (d) Straight chain hydrocarbons like octane generally burn more smoothly than branched hydrocarbons. 5-trimethyl-4-ethylbenzene (e) 1-ethyl-2. Alkynes c 25.5-trimethylbenzene (d) 6-ethyl-1.5-trimethylbenzene .3-dimethylbutylethylacetylene What is the correct structure for 2.7-dimethyl-3-octyne (e) 5. Give the correct IUPAC name for the following alkyne.3. CH3CHCH2CHC CH3 CH3 C CH2CH3 (a) 2.5-trimethylbenzene (c) 1. Which of the following alkynes can exist as cis-trans isomers? (a) propyne (d) 1-butyne (b) 2-butyne (c) 3-methyl-1-butyne (e) Alkynes cannot have geometric isomerism.(e) Cracking involves heating higher molecular weight hydrocarbons in the absence of air and in the presence of a catalyst.4-dimethyl-5-octyne (c) 5.3.4. e*27. What is the name for the following compound? CH3 CH2CH3 H3 C CH3 (a) 4-ethyl-1.7-dimethyloctyne d 26. Aromatic Hydrocarbons b 28.3.3. (b) 4-methyl-5-isooctyne (d) 1.7-dimethyl-4-nonyne? (a) CH3CH CH2CH CHCH2CHCH2CH3 CH3 CH3 (b) CH3CH2CHC CCH2CH2CHCH3 CH3 CH3 (c) CH3CHCH2C CCH2CH2 CH3 CH3 (d) CH3CHCH2C CCH2CHCH2CH3 CH3 CH3 (e) None of the preceding structures is correct.6-trimethylbenzene (b) 2-ethyl-1. and common name below is incorrect? Formula CHCl3 CCl4 C6H5I CH3Cl CH2Cl2 IUPAC Name trichloromethane tetrachloromethane iodobenzene chloromethane dichloromethane Common Name chloroform carbon tetrachloride phenyl iodide methyl chloride methene chloride (a) (b) (c) (d) (e) . Organic Halides a 30. or cyclic.2-dibromopentane (c) 1.2-dibromopropane (e) None of these answers is correct. Which combination of formula. acetylene. Which one of the following is not an alkyl chloride? H2 C H2C CH2 CHCl C H2 CH3 Cl CH3 C CH3 Cl H2C (a) (d) CH3Cl d 31.1-dibromoethane (d) 1. branched-chain. (b) (c) (e) CH3CH2CH2Cl What is the correct name for the compound below? Br H Br C H C H H C H H (a) 1.Hydrocarbons: A Summary e. and ethane are examples of hydrocarbons. Hydrocarbons can be straight-chain. Hydrocarbons can be saturated or unsaturated. Hydrocarbons usually have more than correct IUPAC name. IUPAC name. 29 Which of the following statements regarding hydrocarbons is false? (a) (b) (c) (d) (e) Hydrocarbons contain hydrogen and carbon only. (b) 1.1-dibromopropane e 32. Benzene. 2-dimethyl-1-pentanol (c) 2-methyl-2-pentanol (d) 2. .d 33.2-dichloropentane (e) 2.4-trimethyl-2-pentanol d 38.3. (b) 5-bromo-trans-2.5-trihalohexane d 34. in 1978. Freon™ is a DuPont trademark for certain chlorofluorocarbons The use of freons as propellants in aerosol cans was banned in the U.5-dichlorohexane (c) 4-bromo-1.4-trimethyl-2-pentanol (e) 3. Alcohols and Phenols e 35.S.3-dichlorohexane (d) 5-bromo-2.3.3. Freons damages the earth’s ozone layer. Which one of the following is a secondary alcohol? (a) CH3CH2OH (d) (CH3)3COH (b) CH3OH (c) CH3CH(OH)CH3 (e) None of these answers is a secondary alcohol. Which one of the following is a tertiary alcohol? (a) CH3CH2OH (d) (CH3)3COH (b) CH3OH (c) CH3CH(OH)CH3 (e) None of these answers is a tertiary alcohol.3-dichlorohexane Which of the following statements concerning freons is incorrect? (a) (b) (c) (d) (e) Freons are chlorofluorocarbon compounds. e 37. Freons are very poisonous to animals and plants. Which one of the following is a primary alcohol? (a) 2-propanol (d) cyclohexanol (b) 2-butanol (e) 2-methyl-1-propanol (c) 2-methyl-2-propanol c 36. What is the correct name for the following compound? Cl CH3 CH CH Cl CH2 CH Br CH3 (a) 2-bromo-4. Which one of the following is a secondary alcohol? (a) 2-methyl-1-pentanol (b) 2. 4(2°). 2(2°). How many are primary (1°). 3(2°). and how many are tertiary(3°) alcohols? (a) 5(1°).c*39. Polyhydric alcohols that contain 2 OH groups per molecule are called glycols.5-dimethyl-5-pentanol a 42.4-dimethyl-1-pentanol (d) 5-methyl-2-hexanol (a) (b) OH (c) OH OH CH3 CH3 CH3 (d) OH (e) OH Ethers e 43. Ethanol is very toxic and causes permanent blindness if a small amount is taken internally.5-dimethyl-2-pentanol (e) 2. Ethylene glycol is miscible with H2O and used in commercial permanent antifreeze. 1(3°) (b) 5(1°). Which one of the following is p-cresol? CH3 OH (b) 1. c 40. The properties of alcohols depend on the number of OH groups per molecule and the size of the nonpolar portion of the molecule. d 41. 2(2°). 3(2°). how many are secondary (2°). 1(3°) (d) 4(1°). There are 8 structural isomers of the alcohol with the formula C5H12O. What is the correct IUPAC name for the following compound? CH3 CH CH2 CH3 CH2 CH OH CH3 (a) 2-methyl-5-hexanol (c) 5. 2(3°) (e) 3(1°). 1(3°) Which of the following statements about alcohols and phenols is incorrect? (a) (b) (c) (d) (e) Phenols are weakly acidic. Which of the following is a mixed ether? (a) dimethyl ether (b) diethyl ether (c) methyl ethyl ether . 1(3°) (c) 4(1°). (d) diphenyl ether (e) methyl phenyl ether d 44.5-diethyl-7-heptanal (e) 3-ethyl-6-methyloctanal O CH3CH2 C CH CH3 (b) 6-aldoethyl-3-methyloctane (d) 6-ethyl-3-methyl-8-octanal CH3 is __________. The systematic name for (a) 2-methyl-3-propanol (b) 2-methyl-3-pentanal (c) 2-methyl-3-pentanone . Which of the following statements about ethers is incorrect? Ethers are not very polar and are chemically rather unreactive. (b) aldehyde (c) phenol (d) ketone (e) ether (a) acid O d 46. Ethers are very soluble in water because their structure is like water with organic groups substituted for the two hydrogens. c 48. Diethyl ether is a good solvent for organic compounds. CH3CH2C CH3 is an example of a(an) __________. CH3CH2C H is an example of a(an) __________. (c) (d) (e) b 45. (b) aldehyde (c) phenol (d) ketone (e) ether (a) acid e 47. Which is the correct name for the compound given below? O CH3CHCH2CH2 CH CH2C CH2 CH3 CH2CH3 H (a) 3.6-diethylheptanal (c) 2. Aldehydes and Ketones O (a) (b) alkanes. The physical properties of ethers are similar to those of the corresponding Diethyl ether is a very low boiling liquid. Ketones have two carbon atoms bonded to a carbonyl group. A ketone contains a carbonyl group but an aldehyde does not. Formaldehyde is a common preservative for biological specimens. Many important natural substances are aldehydes and ketones. Which one of the following compounds is not an amine? (a) (CH3)2NH O (d) CH3 C NH2 (e) (CH3)3N (b) CH3CH2NH2 (c) C6H5NH2 e 51. Which is the structural formula for a tertiary amine? . Which of the following statements about aldehydes and ketones is false? (a) (b) (c) (d) (e) Acetone is an excellent solvent. Amines d 50. Which one of the following is a heterocyclic amine? NH2 NH2 (a) CH3 N (b) O H C NH2 CH3 (c) (d) (e) N a 52.(d) 2-methyl-3-propanone (e) ethyl isopropyl ketone c 49. Which is the structural formula for a secondary amine? (a) (CH3)2NH (d) HOCH2CH2NH2 (b) CH3CH2NH2 (e) (CH3)3N (c) C6H5NH2 c 53. (a) isobutyl alcohol (d) butanoic acid b 56.6-dibromotoluene (c) 1. O HO CH2 CH2 CH 2 CH2 C OH (a) 5-pentanol acid (c) 1-hydroxypentanoic acid (e) 5-hydroxy-1-pentanoic acid (b) 4-hydroxypentanoic acid (d) 5-hydroxypentanoic acid .6-dibromo-4-chloroaniline (b) butyl alcohol (e) oxalic acid (c) propionic acid Which of the responses is an accepted name for the following compound? O CH3 CH2 CH Br CH CH3 C OH (a) γ-bromo-β-methylpentanoic acid (b) 3-bromo-2-methylpentanoic acid (c) 3-bromohexanoic acid (d) 2-bromo-1-methylpentanoic acid (e) 3-bromo-3-ethyl-2-methylpropanoic acid d 57.3-dibromo-5-chlorotoluene (d) 2. CH3CH2CH2COOH is __________. Which of the responses is a correct name for the following compound? NH2 Br Br Cl (a) 4-chloro-2.5-dibromo-1-chloroaniline Carboxylic Acids d 55. Give the correct IUPAC name for the following compound.3-dibromo-4-chloro-2-aniline (e) 3. (b) 2-amino-1.(a) CH3CH2CH2 NH2 (d) CH3 N H H (b) CH3CH2 N H CH3 (c) CH3 N CH2CH3 CH3 (e) C6H5 N H CH3 d 54. Most are much stronger acids than phenols. Which one of the following is m-methylbenzoic acid (also called m-toluic acid? O O C OH OH C OH (a) (b) C O CH3 CH3 O CH3 C (c) OH (d) C O OH (e) C O OH d 59. Some Derivatives of Carboxylic Acids b 61. Their general formula is R-COOH. Which of the following statements about carboxylic acids is false? (a) (b) (c) (d) (e) Most are strong acids. Organic acids occur widely in natural products. Which of the following structures is acetyl chloride? O O Cl CH3 C CH 3 CH2 C Cl (a) CH3COOH (b) (c) . Which of the following is not a carboxylic acid containing more than one –COOH group per molecule? (a) oxalic acid (d) benzoic acid (b) tartaric acid (e) lactic acid (c) citric acid a 60. Fatty acids are derived from animal fats.e 58. (d) CH3CH2Cl(e) none of the above c 62. are uncommon in nature. (e) No one has looked for them. (b) ethyl pentanoate (e) butyl ethanoate (c) propyl pentanoate (a) butyl acetate (d) ethyl butanoate d*65. (a) acid b 64. The formulas for the compounds below are labelled as types of acid derivatives. (b) Carboxylic acids. (d) Their –NH2 group causes them to decompose rapidly. and therefore their derivatives. O CH3CH2CH2CH2C OCH2 CH3 d 63. (b) alcohol (c) amide (d) fat (e) oil is called __________. (b) carboxyl (e) ether (c) ester Which classification by functional group for the given compound is incorrect? (a) ethyl acetate — ester (d) propyne — alkyne (b) 2-butanol — alcohol (c) acetylene — alkene (e) chloroform — organic halide . (c) Acid halides are too reactive to exist in nature. Which is incorrectly labelled? O O O O (a) CH3C O CCH3 acid anhydride CH2 CH OH OH (b) CH3CH2C Cl acid halide (c) CH3C O CH2CH3 ester CH3C NH2 (d) CH2 OH (e) O glyceride (triester) Functional Groups amide b*66. Glyceryl tristearate is a(an) __________. Why have acid halides not been observed in nature? (a) All halogen compounds are very uncommon in nature. Which one of the following functional groups is the most polar? (a) carbonyl (d) amide c 67. He reacted it with sulfuric acid and replaced the nitrate groups with sulfate groups. Benzene and other aromatic compounds undergo _____ reactions readily. (a) chloromethane (d) carbon tetrachloride (b) dichloromethane (c) trichloromethane (e) all of the products listed in the first four responses c 70. (a) addition (d) isomerization b 72. He absorbed the nitroglycerine into diatomaceous earth or wood meal. An alkane does not have a functional group. The double bond is the functional group of an alkene. (a) addition (d) isomerization (b) hydrogenation (e) dehydration (c) substitution c 71. In a ___________ reaction. The only functional group possible in a hydrocarbon is the double bond. e 74. an atom or group of atoms attached to a carbon atom is removed. (a) Lewis acid (d) electron transfer agent (b) detergent (c) vasodilator (e) catalyst for hydrogenation d 73. He froze the nitroglycerine into a solid. Why is it difficult to prepare only methyl chloride when reacting methane with chlorine? . The functional group represents the most common site for reactivity. and another atom or group of atoms takes its place.e 68. dynamite. Alfred Nobel became rich by discovering how to make the very sensitive explosive nitroglycerine (or glycerol trinitrate) into the more safe-to-handle explosive. (b) hydrogenation (e) dehydration (c) substitution Sodium lauryl sulfate (or sodium dodecyl sulfate) is an effective _____. Which of the following statements about functional groups is false? (a) (b) (c) (d) (e) The functional group of an alcohol is the –OH group. The reaction of methane with chlorine in the presence of ultraviolet radiation can produce _____. He added water to the nitroglycerine to keep it wet. Substitution Reactions e 69. What was his method? (a) (b) (c) (d) (e) He carefully distilled out the impurities that made it sensitive. (a) CH2(OH)CH2(OH) (c) CH3CH2Cl (e) CH2(Cl)CH(OH)CH2Cl (b) CH3OH (d) CH2(OH)CH(OH)CH2Cl c 80. CH2(OH)-CH=CH2. Treatment of allyl alcohol. Dilute aqueous hypochlorous acid is sometimes called chlorine water because the reaction of HOCl with water produces Cl2. an intermediate in the production of glycerol. two. . The conditions required to start the reaction are so extreme that most of the reactants are destroyed before they can react. (a) substitution (d) photochemical reaction (b) alkylation (e) bromination (c) hydrogenation b 78. three. The methyl chloride is very unstable and quickly decomposes. (d) The methane is so reactive with other methane molecules that carbon chains tend to form. with chlorine water produces _____. The reaction is very slow under all possible conditions. Which classes of hydrocarbons react rapidly at room temperature by addition reactions? (a) aromatics and alkenes (d) alkanes and alkenes c 77. (e) It is difficult to stop the reaction after only one chlorine has been substituted.2-dibromoethene (e) they would not react (c) (a) bromoethene bromoethane (d) bromoacetylene d*79. or four chlorines per molecule. therefore the result is a mixture of compounds with one. The addition of Br2 is used as the reaction to distinguish between alkanes and alkenes. What fundamental class of organic reactions is the nitration of an aromatic ring? (a) polymerization (d) elimination (b) addition (e) cyclization (c) substitution Addition Reactions b 76. (b) alkenes and alkynes (e) alkanes and alkynes (c) alkanes and aromatics Vegetable oils can be converted to fats by _____ in the presence of a catalyst under high pressures and at high temperatures.(a) (b) (c) c 75. What would be the product of addition of one equivalent of bromine to acetylene? (b) 1. What is the missing product for the reaction below? CH3 CH2 Br + Na+ OH– (b) CH3 (e) CH 2 CH CH 2 + H2 O + (c) CH3CH2 NaBr (a) HC CH (d) CH3CH2CH2CH3 . Bromine reacts with alkanes to form a precipitate. it becomes colorless. Bromine dissolves in alkanes but not in alkenes. What is the product of the reaction given below? O CH3 OCN C CH3 + HCN NaOH (aq) OH CN (a) CH3 C CH3 H OH (b) CH3 C CH3 CN (c) CH3 C CH3 H CN (d) CH3 C CH2 c 82.What is the observation that accompanies this test? (a) (b) (c) (d) (e) A bright red color is produced when Br2 reacts with an alkene. b 81. What fundamental class of organic reactions is a hydration reaction? (a) substitution (d) polymerization (b) addition (e) cyclization (c) elimination Elimination Reactions e 84. Bromine is a dark red liquid. (e) CH3 C CH2 What fundamental class of organic reactions is a hydrogenation reaction? (a) substitution (d) elimination (b) polymerization (e) cyclization (c) addition b 83. When it adds to the double bond of an alkene to make the dibromide. The red color of bromine disappears when it dissolves in alkanes. Which of the following is not an addition polymer? (a) polyvinyl chloride (d) styrofoam (b) nylon (e) polypropylene (c) teflon . (c) Dehydrohalogenation is an example of an elimination reaction. (b) Elimination results in an increase in the degree of unsaturation. d 86. What fundamental class of organic reactions is a dehydration reaction? (a) substitution (d) elimination (b) addition (e) cyclization (c) polymerization d 87. (a) fluorination (d) elastation (b) fluoridation (e) polymerization (c) vulcanization e 89. b 90. What fundamental class of organic reactions results in the increasing of the degree of unsaturation of the reacting compound? (a) substitution (d) elimination Polymerization (b) addition (e) hydrolysis (c) polymerization e 88.d 85. Which of the following statements about elimination reactions is false? (a) An elimination reaction involves a decrease in the number of atoms or groups attached to carbon. Which match is incorrect? Polymer Class (a) proteins natural (b) wool natural (c) teflon synthetic (d) nylon synthetic (e) silk synthetic The reaction by which tetrafluoroethylene is converted into teflon is called _____. Below is a list of polymers that are each matched with its class. (d) Hydration is an elimination reaction. (e) Simple elimination reactions are relatively rare. The sap of the rubber tree is called latex. Vulcanization uses sulfur to prevent heated rubber from becoming sticky. What is a functional group and how does it play a role in organic compounds? 95. A ___________ is a high-molecular-weight chain of small molecules. addition . 97.c 91. and elimination reactions? Give some examples. What are some similarities and differences between substitution. (b) natural addition polymers. (c) synthetic addition polymers. In what other ways are they used and how will they be replaced in the future? . Conceptual Questions 94. Proteins are examples of (a) natural condensation polymers. Suppose you wanted to develop a new pharmaceutical compound. (a) monomer (d) ester (b) polymer (e) acid chloride (c) ether b 93. 96. Describe your approach in both your background research and your laboratory research. Zinc oxide is a common filler used in rubber to increase durability. It is not possible to make synthetic rubber. (d) natural polyesters. Petroleum and natural gas are valuable as fuel sources. (e) synthetic condensation polymers. 98. Which of the following statements about rubber is false? (a) (b) (c) (d) (e) Natural rubber is obtained from the sap of the rubber tree. a 92. Name some synthetic polymers and discuss the impact they have had in our society.