CHEM 1601 Exam 4 – Flashcards
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What is the characteristic feature of all alkynes? a. The presence of one or more carbon-carbon double bonds b. The presence of one or more carbon-carbon triple bonds c. The presence of at least one carbon-carbon double bond, and at least one carbon-carbon triple bond d. The presence of a ring system
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The presence of one or more carbon-carbon triple bonds
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Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogen atoms? a. The alkane b. The alkene c. The alkyne d. None, they all contain the same number of hydrogen atoms
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The alkyne
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What is true of cis and trans isomers? a. They have the same structural connectivity b. They have the same physical properties c. Both a and b d. Neither a nor b
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They have the same structural connectivity
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What is not a correct IUPAC name for an alkene? a. 2-methyl-1-butene b. 2-methyl-2-butene c. 2-methyl-3-butene d. None, these are all correct IUPAC names
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2-methyl-3-butene
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Cis-trans isomers do not exist for which of the following compounds, all of which have the molecular formula C3H4Br2? a. 1,1-dibromopropene b. 1,2-dibromopropene c. 1,3-dibromopropene d. They do not exist for any of these three molecules
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1,1-dibromopropene
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Stereoisomers exist for which of the following molecules, all of which have the molecular formula c5h8? a. 1,3-pentadiene b. 1,4-pentadiene c. 2-methyl-1,3-butadiene d. All of them
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1,3-pentadiene
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Which of the following is not a correct IUPAC name? a. 3-methylcyclopentene b. 4-methylcyclopentene c. 5-methylcyclopentene d. None, they are all correct
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5-methylcyclopentene
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Of the following alkenes, all of which have the molecular formula C5H10, which would you expect to have the highest boiling point? a. 4-methyl-1-pentene b. 4-methyl-2-pentene c. 2,3-dimethyl-2butene d. 2-hexene
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2-hexene
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Which of the following is the most characteristic reaction of alkenes? a. Addition b. Oxidation c. Reduction d. Substitution
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Addition
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Which of the following reactions involves the addition of different groups to the two ends of a double bond? a. Hydrogenation b. Hydrobromination c. Both a and b d. Neither a nor b
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Hydrobromination
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Markovnikov's rule is useful to predict the outcome of the reaction of hydrogen chloride with which of the following alkenes? a. 1-butene b. 2-butene c. Both a and b d. Neither a nor b
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1-butene
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What type of alcohol is formed by the hydration of 2-butene? a. Primary b. Secondary c. Tertiary d. None of these, the product is not an alcohol
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Secondary
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Which of the following reactions requires a transition metal catalyst? a. Halogenation b. Hydrohalogenation c. Hydrogenation d. Hydration
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Hydrogenation
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What is the most specific name for the C6H3- group? a. Aryl b. Arenyl c. Phenol d. Phenyl
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Phenyl
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Which of the following compounds is a hydrocarbon? a. Aniline b. Anisole c. Phenol d. Toluene
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Toluene
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What is produced when benzene reacts with nitric acid in the presence of sulfuric acid? a. Only nitrobenzene b. Nitrobenzene and NO c. Nitrobenzene and NO2 d. Nitrobenzene and water
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Nitrobenzene and water
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Which aromatic substitution reaction is used in the preparation of synthetic detergents? a. Reduction b. Halogenation c. Nitration d. Sulfonation
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Sulfonation
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Which of the following is an appropriate definition of an aromatic compound? a. Any compound that contains one or more benzene-like rings b. Any compound that contains one or more 6-membered rings c. Any compound that contains a double bond within a 6-membered ring d. Any compound with a pleasant odor
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Any compound that contains one or more benzene-like rings
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Which of the following compounds is an amine? a. Aniline b. Anisole c. Phenol d. Toluene
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Aniline
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Which of the following correctly describes the two aromatic ring substituents in the xylenes? a. They are both hydroxyl groups b. They are both methyl groups c. One is a methyl and one is an hydroxyl d. One is a methyl and one is an ethyl
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They are both methyl groups
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How many constitutional isomers are possible when there are three identical substituents on a benzene ring? a. 2 b. 3 c. 4 d. 5
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3
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Which of the following elements is present in thiols but not in alcohols? a. C b. O c. P d. S
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S
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Which of the following is the IUPAC name of butyl alcohol? a. 1-butanol b. 2-butanol c. 2-methyl-1-propanol d. 2-methyl-2-propanol
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1-butanol
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Which of the following is the IUPAC name of tert-butyl alcohol? a. 1-butanol b. 2-butanol c. 2-methyl-1-propanol d. 2-methyl-2-propanol
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2-methyl-2-propanol
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Which of the following is a glycol? a. HOCH2CH2CH2OH b. HOCH2CH2CHCH3-OH c. HOCH2CH2OH d. None of these is a glycol
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HOCH2CH2OH
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Which of the following is true about the polarities of the C-O and O-H bonds? a. Neither the C-O nor the O-H bond is polar b. The C-O and O-H bonds are equally polar c. Both bonds are polar, but the C-O bond is less polar than the O-H bond d. Both bonds are polar, but the O-H bond is less polar than the C-O bond
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The C-O and O-H bonds are equally polar
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Which of the following compounds is most soluble in water? a. 1-pentanol b. propane c. 1-propanol d. trans-2-butene
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1-pentanol
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Which of the following statements about London dispersion forces is/are true? a. London dispersion forces are stronger between molecules of 1-butanol than between molecules of 2-methyl-2-propanol. b. London dispersion forces are weaker than hydrogen bonding interactions. c. Both a and b d. Neither a nor b
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Both a and b
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Which of the following is the major product obtained from the dehydration of 2,3-dimethyl-3-pentanol? a. 2-isopropyl-2-butene b. 2,3-dimethyl-2-pentene b. 3,4-dimethyl-2-pentene d. None of these
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2,3-dimethyl-2-pentene
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In which class of compounds is the carbon at the functional group most highly oxidized? a. Alcohols b. Aldehydes c. Carboxylic acids d. Ketones
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Carboxylic acids
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Ketones can be obtained by the oxidation of which of the following? a. 1-degree alcohols b. 2-degrees alcohols c. 3-degrees alcohols d. None of these
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2-degrees alcohols
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What is the smallest number of hydrogen atoms which can be found in a noncyclic unsymmetrical ether that contains only C, H and a single O atom? a. 3 b. 6 c. 8 d. 10
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8
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Which of the following correctly gives the order of boiling points for the molecules propane, dimethyl ether, and ethanol? a. Ethanol > dimethyl ether > propane b. Ethanol > propane > dimethyl ether c. Propane > dimethyl ether > ethanol d. Propane > ethanol > dimethyl ether
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Ethanol > dimethyl ether > propane
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Which of the following is true of liquid ethers? a. They are both volatile and highly flammable b. They are neither volatile nor highly flammable c. They are volatile, but are not flammable d. They are flammable, but are not volatile
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They are both volatile and highly flammable
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Thiols are most closely related to which of the following classes of compounds? a. Alcohols b. Aldehydes c. Carboxylic acids d. Ketones
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Alcohols
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What is the smallest number of carbon atoms which can be found in an ether? a. 1 b. 2 c. 3 d. 4
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2
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Which class of compounds is not widespread in nature, and has little importance in biochemistry? a. Alkanes b. Alkenes c. Alkynes d. Arenes
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Alkynes
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Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain most hydrogen atoms? a. The alkane b. The alkene c. The alkyne d. None, they all contain the same number of hydrogen atoms
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The alkane
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Which of the following is the starting material derived from natural gas that is used for the production of ethylene? a. Acetylene b. Benzene c. Ethane d. Methane
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Ethane
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Which of the following structural features is never associated with cis-trans isomerism? a. Double bonds b. Ring systems c. Triple bonds d. None, they are all associated with cis-trans isomerism
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Triple bonds
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Which of the following is not a correct IUPAC name for an alkene? a. 2-methyl-1-butene b. 2-methyl-2-butene c. 3-methyl-1-butene d. None, these are all correct IUPAC names
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3-methyl-1-butene
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A student wanted to use the branched groups, isobutyl, sec-butyl, and tert-butyl when naming alkenes, but was told not to. What is the correct IUPAC name for the compound the student called isobutylethene? a. 4-methyl-1-pentene b. 3-methyl-1-pentene c. 3,3-dimethyl-1-butene d. None of these
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4-methyl-1-pentene
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Cis-trans isomers exist for which of the following molecules, all of which have the molecular formula c3h5br? a. 1-bromopropene b. 2-bromopropene c. 3-bromopropene d. None of these
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1-bromopropene
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Including cis-trans isomers, how many different alkenes have the molecular formula C5H10? a. 4 b. 5 c. 6 d. 7
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6
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Cis-trans isomers exist for which of the following? a. 1,2-dimethylcyclopentene b. 2,3-dimethylcyclopentene c. 3,5-dimethylcyclopentene d. All of them exist
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3,5-dimethylcyclopentene
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Which of the following best describes the odors of aromatic compounds? a. They all have strong odors b. They all have pleasant odors c. They all have unpleasant odors d. Some have pleasant odors, some have unpleasant odors, and some are odorless
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Some have pleasant odors, some have unpleasant odors, and some are odorless
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Which of the following compounds is anisole? a. CH3 b. OH c. OCH3 d. NH4
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OCH3
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Which of the following compounds is an ether? a. Aniline b. Anisole c. Phenol d. Toluene
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Anisole
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Which of the following is a correct IUPAC name? a. 2-chloro-3-bromotoluene b. 3-bromo-2-chlorotoluene c. 2-chloro-4-bromotoluene d. 6-bromo-4-chlorotoluene
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3-bromo-2-chlorotoluene
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Which of the following is the IUPAC name of sec-butyl alcohol? a. 1-butanol b. 2-butanol c. 2-methyl-1-propanol d. 2-methyl-2-propanol
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1-butanol
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Which of the following is the common name of 2-methyl-2-propanol? a. Sec-butyl alcohol b. Tert-butyl alcohol c. Isobutyl alcohol d. Isopropyl alcohol
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Tert-butyl alcohol
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Which of the following is true of the alcohol functional groups in 1,3-propanediol? a. One is primary and one is secondary b. One is primary and one is tertiary c. Both are primary d. Neither is primary
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Both are primary
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Which of the following alcohols is most soluble in water? a. 1-pentanol b. 1,5-pentanediol c. 1,3,5-pentanetriol d. None, they are all equally soluble
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1,3,5-pentanetriol
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Of the alcohols with the molecular formula C4H9OH, which has the lowest boiling point? a. 1-butanol b. sec-butyl alcohol c. tert-butyl alcohol d. isobutyl alcohol
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Tert-butyl alcohol
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Which of the following classes of compound reacts with sodium hydroxide to give a water-soluble salt? a. 1-degree alcohols b. Phenols c. Both a and b d. Neither a nor b
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Phenols
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If experimental conditions are carefully controlled, aldehydes can be obtained by the oxidation of which of the following? a. 1-degree alcohols b. 2-degrees alcohols c. 3-degrees alcohols d. All of these
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1-degree alcohols
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What is the name of the -OCH3 group? a. Methyloxy b. Methoxy c. Oxymethyl d. Oxymeth
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Methoxy
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Which of the following correctly gives the order of boiling points for the molecules pentanol, ethyl propyl ether, and hexane? a. Hexane > ethyl propyl ether > pentanol b. Hexane > pentanol > ethyl propyl ether c. Pentanol > ethyl propyl ether > hexane d. Pentanol > hexane > ethyl propyl ether
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Pentanol > ethyl propyl ether > hexane
