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84 Practice Problems for Chapter 21 – Chem 1C 1.Name the following:A)isopropaneB)methylpentaneC)methylbutaneD)n-pentaneE)dodecane2.Name the following:A)n-heptaneB)2-methyl-2-ethylbutaneC)3,3-dimethylpentaneD)2,2-diethylpropane3.Name the following: A)2,4-diethylpentaneB)3,5-dimethylheptaneC)secondary ethylpentaneD)2,3-dimethyl-2,3-diethylpropaneE)none of these4.In lecture, a professor named a molecule 2-ethyl-4-tert-butylpentane. A student pointed out that the name was incorrect. What is the correct systematic name for the molecule?A)2-t-butyl-5-methylhexaneB)2-ethyl-4,5,5-trimethylhexaneC)3,5,6,6-tetramethylheptaneD)2,2,3,5-tetramethylheptaneE)undecane5.Structural isomers haveA)different molecular formulas and different structures.B)different molecular formulas but the same structure.C)the same molecular formula and the same structure.D)the same molecular formula but different structures.E)none of these6.How many structural isomers does propane have?A)3B)2C)1D)5E)47.The product of ethane undergoing dehydrogenation is calledA)propene.B)methene.C)ethene.D)propane.E)none of these8.Which of the following, upon reacting with oxygen, would form the greatest amount of carbon dioxide?A)n-pentaneB)isopentaneC)neopentaneD)Two of these would form equal amounts.E)All of these would form equal amounts.9.Which of the following has the lowest boiling point?A)methaneB)butaneC)ethaneD)propaneE)All of these have the same boiling point.10.Which of the following names is a correct one?A)3,4-dichloropentaneB)1-chloro-2,4-methyl-3-ethylcyclohexaneC)1,1-dimethyl-2,2-diethylpentaneD)cis-1,3-dimethylbutaneE)2-bromo-1-chloro-4,4-diethyloctane11.What is the compound whose carbon skeleton (minus any hydrogen atoms) appears below? A)2,4-diethyl-3,6-dimethylheptaneB)2,5-dimethyl-4,6-diethylheptaneC)1,4-diethyl-3,6-dimethyl-tridecaneD)5-ethyl-3,4,6-trimethyloctaneE)4-ethyl-2,5,6-trimethyloctane12.The compound below is the carbon skeleton (minus any hydrogen atoms) of I.a C12H26II.a substituted octaneIII.a compound with 3 tertiary carbonsIV.a compound with 3 secondary carbonsV.a compound with 2 isopropyl groupsA)I, II, IIIB)II, III, IVC)III, IV, VD)II, IV, VE)I, II, III, IV13.A student gave a molecule the following name: 3-methyl-4-isopropylpentaneHowever, the teacher pointed out that although the molecule could be correctly drawn from this name, the name violates the IUPAC rules. What is the correct (IUPAC) name for the molecule?A)4-isopropyl-3-methylpentaneB)2-isopropyl-3-methylpentaneC)1,1,2,3-tetramethylpentaneD)2,3,4-trimethylhexaneE)3,4-dimethylheptane14.A student gave a molecule the following name: 2-ethyl-3-methyl-5-butylhexaneHowever, his TA pointed out that although the molecule could be correctly drawn from this name, the name violates the systematic rules. What is the correct (IUPAC) name for the molecule?A)3,4-dimethyl-6-butylheptaneB)2-butyl-4,5-dimethylheptaneC)5,7,8-trimethyldecaneD)1,2-diethyl-3,6,7-trimethylnonaneE)3,4,6-trimethyldecane15.Name the following:A)2,2,3,5-tetramethyl-7-propyl-7-t-butyldecaneB)6-propyl-2,6-di-t-butylnonaneC)2,2,5,7,8,8-hexamethyl-3,3-dipropylnonaneD)isonananeE)none of these 16.How many isomers of C4H10 are there?A)3B)5C)4D)2E)617.How many isomers are there with the formula C3H4? Include both structural and geometric isomers.A)3B)2C)5D)6E)418.1-Propene undergoes hydrogenation. The product of this isA)methane.B)ethane.C)propane.D)2-propane.E)none of these19.Which of the following is not a structural isomer of 1-pentene?A)2-penteneB)2-methyl-2-buteneC)cyclopentaneD)3-methyl-1-buteneE)1-methyl-cyclobutene20.Which of the following is an incorrect name?A)trans-1,2-dichloroetheneB)buteneC)ethyneD)cis-1,1-dichloropropaneE)1,1-dichloropropane21.H2CCHCH2N(CH3)2 isA)an alkyne and a secondary amine.B)an alkene and a primary amine.C)an alkene and a tertiary amine.D)an alkyne and a tertiary amine.E) none of these22.Name the following: A)1-hexyneB)2-ethynyl butaneC)2-ethyl-3-butyneD)3-methyl-1-pentyneE)3-methyl-4-pentyne23.Name the following:A)2-chloro-3-chloro-cis-2-buteneB)2,3-dichloro-cis-2-buteneC)2,3-dichloro-trans-2-buteneD)1-chloro-1-methyl-2-chloro-propeneE)2,3-dichloro-1-methyl-propene24.Name the following: A)1,1,1-trichloro-5-bromo-3-penteneB)5,5,5-trichloro-1-bromo-2-penteneC)1,1,1-trichloro-5-bromo-2-penteneD)1,1,1-trichloro-5-bromo-3-pentyneE)none of these25.How many structural and geometric isomers are there of chloropropene?A)2B)3C)4D)5E)more than 526.Consider the molecule trans-2-butene. Which statement is true?A)The molecule has two ? bonds.B)There is free rotation around every bond in the molecule.C)Cis-2-butene is its structural isomer.D)Carbon #2 exhibits sp2 hybridization.E) None of these27. Which of the following compounds can exhibit geometric isomerism?A)B)C)D)E)28.Consider the following four compounds:Which of these compounds would have the same physical properties (melting point, boiling point, density, and so on)?A)I and IIB)I and IIIC)II and IIID)III and IVE) I and IV29.Which of the following types of compounds lacks an sp2-hybridized carbon center?A) aldehydesB) ketonesC) alcoholsD) alkenes30.For which of the following compound(s) are cis and trans isomers possible?A)3,4-diethyl-3-hexeneB)2,3-dichloro-2-buteneC)2,2-dimethylcyclohexanolD)ortho-chloroanalineE)dibromoethyne31.How many different possible tetramethylbenzenes exist?A)2B)3C)4D)5E)632.Which of the following have a -C-O-C- functional group?A)estersB)ethersC)aminesD)aldehydesE)alcohols33.The common name for 2-propanol isA)n-propyl alcohol.B)ethanol.C)methanol.D)isopropyl alcohol.E)none of these34.The oxidation of secondary alcohols results inA)ketones.B)secondary alcohols.C)aldehydes.D)esters.E)ethers.35.In which of the following lists do all members have a C=O bond?A)ester, aldehyde, secondary alcohol, ketoneB)any alcohol, ether, esterC)secondary alcohol, ketone, aldehydeD)ester, aldehyde, ketoneE)carboxylic acid, ether, tertiary alcohol36.Identify the type of organic compound shown: (CH3)2CHNH2A)primary alcoholB)primary amineC)tertiary amineD)carboxylic acidE)ether37.Name the following:A)n-propyl acetateB)isopropyl formateC)isopropyl acetateD)ethyl propanoateE)none of these38.Name the following: A)methyl alcoholB)ethyl alcoholC)propyl alcoholD)isopropyl alcoholE)butanol39.Name the following:A)acetoneB)butyraldehydeC)diethylketoneD)diethyl etherE)none of these40.Name the following: A)2-chloro-3-ethyl-1-isopropylbutanoneB)isopropyl-chloro,methylbutyl ketoneC)2-butyl,chloro,isobutanoyl methaneD)4-chloro-2,5-dimethyl-3-heptanoneE)3-methyl-4-chloro-1-isopropylpentanone41.Identify the type of organic compound shown: A)aldehydeB)esterC)amineD)ketoneE)none of these42.Identify the type of organic compound shown: A)aldehydeB)esterC)amineD)ketoneE)none of these43.Classify the following molecule: A)primary alcoholB)secondary alcoholC)tertiary alcoholD)etherE)phenol44.Identify the secondary amine.A)CH3CH2NH2B)CH3NHCH2CH3C)D)NH2OHE)(CH3)2NCH2CH345.Classify the following molecule: A)primary amineB)secondary amineC)tertiary amineD)amino acidE)peptide46.Classify the following molecule: A)acidB)aldehydeC)amineD)ketoneE)carbonyl47.Which of the following will yield a carboxylic acid upon oxidation?A)a secondary alcoholB)an aldehydeC)a cycloalkaneD)a ketoneE)tertiary alcohol 48.If you were to heat pentanoic acid and 2-butanol with an acid catalyst, which of the following would you be most likely discover in your flask?A)a ketoneB)an esterC)an amineD)an alkaneE)an aldehyde49.Classify the following molecule:A)acidB)aldehydeC)amineD)ketoneE)carbonyl50.Oxidation of 2-methyl-1-butanol could yieldI.2-methyl-1-butanoneII.2-methylbutanalIII.2-methylbutanoic acidA)I onlyB)II onlyC)III onlyD)II and IIIE)I and III51.Refer to the following structures. Which of the statements below is true of them?A)I and II have different molecular formulas.B)I and III are structural isomers of each other.C)II and III are stereoisomers of each other.D)II and III are different conformations of the same compound.E)I and III are the same compound.52.Which structure represents an optically active aldehyde?A)B)C)D)E)53.Pick the optically active molecule among the following:A)B)C)D)E)none of these54.Which of the following molecules exhibits chirality?A)CH4B)CH3OHC)CH3CH2OHD)E)CH3CClFOH55.Which of the following is optically active (that is, chiral)?A)diethylamineB)difluoromethaneC)2-bromopropaneD)2-chloropentaneE)1-chlorohexane56.Which of the following yields a primary alcohol upon reduction?A)a ketoneB)an alkeneC)an amineD)an aldehydeE)an ether57.When C4H8 is treated with water and H2SO4, a tertiary alcohol is produced. Which of the following structures could represent C4H8 in this reaction?A)CH3CH = CHCH3B)CH3CH2CH = CH2C)D)CH3CH2CH2CH3E)none of these58.Oxidation of a primary alcohol results in a(n) __________, and oxidation of a secondary alcohol results in a(n) _________.A)carboxylic acid, amineB)aldehyde, ketoneC)ester, etherD)ketone, aldehydeE)amine, carboxylic acid59.The boiling point of methanol is much higher than that of ethane. This is primarily due toA)the difference between the molar mass of methanol and that of ethane.B)the hydrogen bonding in methanol.C)the significant molecular size difference between methanol and ethane.D)the carbon-oxygen double bond in the methanol.E)none of these60.Teflon is an example of aA)copolymer.B)homopolymer.C)dimer.D)two of theseE)none of these61.No atoms are lost from starting material in making which kind of polymer?A)condensation polymerB)polyester polymerC)addition polymerD)vulcanized polymerE)branched polymer62.The structures of proteins are partially determined by the order of various amino acids in the macromolecule. This level of structural determination is known asA)primary structure.B)secondary structure.C)tertiary structure.D)quaternary structure.E)the order of bases.63.A polypeptide isA)an addition polymer of amino acids.B)a condensation polymer of amino acids.C)a polymer of sugar molecules.D)a part of nucleic acids.E)none of these64.Which of the following is the best description of a protein?A)an alternating chain of amino acids and nucleic acidsB)a chain of amino acids connected by ester bondsC)two antiparallel chains of nucleic acids connected by hydrogen bondingD)a chain of amino acids formed by condensation polymerizationE)a chain of nucleotides connected by phosphodiester bonds65.A protein isA)a polysaccharide.B)a saturated ester of glycerol.C)one of the units composing a nucleic acid.D)a polymer of amino acid units.E)an aromatic hydrocarbon with a fused ring structure.66.The condensation product of two amino acids is a(n)A)peptide.B)ketone.C)ether.D)ester.E)alcohol.67.An example of a secondary structure of a protein isA)an alpha amino acid.B)a peptide linkage.C)a pleated sheet.D)serine.E)none of these68.Hydrogen bonding between –C=O groups and NH– groups in the backbone of a protein determines theA)primary structure.B)secondary structure.C)tertiary structure.D)quaternary structure.E)all of these69.The overall shape of a protein is maintained byA)hydrogen bonding.B)ionic bonds.C)dipole-dipole bonding.D)covalent bonds.E)all of these70.The analysis of a protein for its amino acid content is valuable in determining the protein'sA)tertiary structure.B)secondary structure.C)quaternary structure.D)primary structure.71.The alpha helix of a protein is held in a coiled conformation partly because ofA)hydrogen bonding.B)optical activity.C)active sites.D)double bonding.72.What are the building blocks of proteins?A)nucleotidesB)glucose and sucroseC)lipidsD)amino acids73.Which of the following is not a carbohydrate?A)riboseB)asparagineC)glycogenD)starchE)fructose74.Which of the following is a carbohydrate reservoir for animals?A)starchB)celluloseC)glycogenD)two of theseE)none of these75.What is the complementary nucleic acid sequence for the DNA sequence GAC TAC GTT AGC?A)GAC TAC GTT AGCB)TCA GCA TGG CTAC)CGA ATG CAT CAGD)CTG ATG CAA TCGE)GCG AAA GGG TTA76.Which one of the following statements about the structure of proteins is incorrect?A)Disulfide bonds provide strong intrachain interactions.B)Hydrogen bonding stabilizes the ?-helix proteins.C)Nonpolar groups tend to face the outside of a protein in an aqueous solution.D)Ionized amino acid side chains can form salt bridges within a protein.E)Heat can disrupt tertiary structure.77.Which of the following pairs of substances could form a polyester?A)H2C=CHCH3 + CH3CH2CH2COOHB)HOOC(CH2)2COOH + H2NCH2CH=CHCH3C)H2C=CH2 + H2C=CHCH3D)HOCH2CH2OH + HOOCCOOHE)H2NCH2COOH + H2NCOCH2CH2COOH78.Consider the polymer drawn below:What monomer(s) is (are) needed to produce the above polymer?A)CH2 = CH2 and CH3CH = CH2B)CH2 = C(CH3)2C)CH3CH = CHCH3D)CO and CH2 = CH2E)none of the above79.What is added to form the polymer below? nA)CH2 = CH – CH3B)CH3CH2CH3C)CH3 – CH = CH – CH3D)H2C = CH – CH – CH2E)CH3CH = C(CH3)280.Which of the following pairs of substances could form an addition copolymer?A)HOOCCH2OCH2COOH + HOCH2CH2OHB)HO(CH2)4COOH + HOCH2CH2CH2NH2C)H2C=CHCH=CH2 + H2CCH=CHCH3D)HOCH2CH2OH + HOOCCH2COOHE)H2NCH2COOH + H2NCOCH2CH2COOH81.The structure of the polymer used in a freezer wrap can be described mainly as follows: [CCl2 ??CH2 ??CCl2 ?? CH2 ?? CCl2 ?? CH2 ?? CCl2 ?? CH2]nThe chief monomer of this wrap would have which structure?A)CCl2 = CH2B)Cl2C – CH2C)Cl2C = CH2 = CCl2D)CCl2E)none of these82.Indicate which of the following monomers is(are) used to produce the polymer A)I onlyB)II onlyC)III onlyD)I and IIIE)II and III83.The formula below is the repeating unit of aA)homo-polymer formed by an addition reaction.B)homo-polymer formed by a condensation reaction.C)co-polymer formed by an addition reaction.D)co-polymer formed by a condensation reaction.E)polyester formed by an addition reaction.84.What monomer(s) is(are) needed to make the polymer shown here?I.HOCH2CH2OHII.HOOCCH2CH2COOHIII.HOCH2CH2COOHIV.HOCH = CHOHV.HOOCCH = CHCOOHA)II onlyB)III onlyC)I and IID)IV and VE)II and IIIAnswer Key1.C11.E21.C31.B41.B51.E61.C71.A81.A2.C12.A22.D32.B42.A52.B62.A72.D82.B3.B13.D23.C33.D43.C53.C63.B73.B83.D4.D14.E24.E34.A44.B54.E64.D74.C84.C5.D15.A25.E35.D45.A55.D65.D75.D6.C16.D26.D36.B46.B56.D66.A76.C7.C17.A27.B37.C47.B57.C67.C77.D8.E18.C28.C38.D48.B58.B68.B78.B9.A19.E29.C39.D49.D59.B69.E79.C10.E20.D30.B40.D50.D60.B70.D80.C ................
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