Exam 3 (Chapter 9 – 11) Practice Questions – Flashcards

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question
The chemical formula of methanol is CH3OH. How many unshared electron pairs are associated with a molecule of methanol?
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2
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In which of the following classes of organic compounds is an oxygen atom bonded to a hydrogen atom? -alcohols -amines -aldehydes -all of the above
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alcohols
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Compounds which contains only carbon-carbon single bonds are classified as which of the following? - alkynes - alkenes - arenes - alkanes
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alkanes
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Compounds which contain one or more benzene-like rings are classified as which of the following? - alkenes - alkynes - alkanes - arenes
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arenes
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Which of the following is the formula for hexane? -c6h16 -C6H6 -C6H14 -C6H10
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C6H14
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*#1 - image * What is the molecular formula for the following compound? - C7H16 - C8H18 - C8H17 - C6H16
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C8H18
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*#2 - image* Which of the following compounds are constitutional isomers?
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all of them
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*#3 - image* Which of the following line-angle structures is a 4-isopropyloctane?
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the fourth image D.)
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*#4 - image* What is the IUPAC name of the following compound? - isopropylcyclohexane - 1-propylcyclohexane - propylcyclohexane - 1-propylhexane
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propylcyclohexane
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*#5 - image* Which of the following line-angle formulas represents butane?
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the second image B.)
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*#6 - image* Which of the listed products will be formed in the following reaction?
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the third option C.)
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*#7 - image* Which alcohol is formed by the hydration of 2-methyl-2-pentene?
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the first one A.)
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*#8 - image* What is the IUPAC name of the following compound?
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5-methyl-3-hexanol
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Which of the following is the IUPAC name of isobutyl alcohol? a.) 1-butanol b.) 2-methyl-1-propanol c.) 2-methyl-2-propanol d.) 2-butanol
answer
2-methyl-1-propanol
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Which of the following is the IUPAC name of tert-butyl alcohol? a.) 2-methyl-2-propanol b.) 1-butanol c.) 2-butanol d.) 2-methyl-1-propanol
answer
2-methyl-2-propanol
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*#9 - image* Which of the following is obtained from the oxidation of isobutyl alcohol with potassium dichromate in aqueous sulfuric acid?
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the fourth one D.)
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*#11 - image*Which of the following is obtainable by the oxidation of tert-butyl alcohol?
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the first one A.) neither a or b
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If a carbon atom is a stereocenter, which of the following statements must be true about that carbon?
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it has four single bonds
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Which of the 3 isomeric alcohols, 2-butanol, 2-methyl-1-propanol, and 2-methyl-2-propanol, are chiral?
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only 2-butanol
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*#10 - image* How many stereocenters are present in the following compound?
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2
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Which product is formed by the chlorination of 2-butene?
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the second one B.) 2,3-dichlorobutane
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*#12 - image*What is the IUPAC name of the following compound? A.) 3-hydroxy-5-methylhexane B.) 5-methyl-3-hexanol C.) 2-methyl-4-hexanol D.) 4-hydroxy-2-methylhexane
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B.) 5-methyl-3-hexanol
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*#13 - image* Which of the following structures represents 4-methycyclohexanol?
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the third one C.)
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Which of the following is true of the alcohol function group 1,3-propanediol? a.) one is primary and one is secondary b.) both are primary c.) neither are primary d.) one is primary and one is tertiary
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c.) both are primary
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*#14 - image* Which of the alcohols shown below will react when heated with concentrated sulfuric acid to give the following alkene as the major product?
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B.) both A and B
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*#15 - image* Which of these compounds is obtained as the major product from the reaction of the following alkene with aquoeus sulfuric acid?
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the fourth one D.)
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What is the smallest number of carbon atoms that can be present in an aldehyde?
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1
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What is the smallest number of carbon atoms that can be present in a ketone?
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3
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*#16 - image* What is the IUPAC name for the following compound? a.) 1-pentanal b.) pentanealdehyde c.) pentanal d.) 1-pentanealdehyde
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c.) pentanal
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Draw the line structures for each of the following: a.) pentane b.) 2-methylhexane c.) 3,3 - diethylheptane d.) 4-ethyl- 2-methyloctane e.) propylcyclopentane f.) 2-heptyne g.) 2-methyl-1-pentene h.) 2,3-dimethyl-2-butene i.) butylbenzene
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answers: *#17 - image*
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*#18 - image* Name the following compounds:
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a.) pentane b.) 3-ethylhexane c.) 2,2,7- trimethyl octane d.) 4-ethyl-2,2,-dimethyl heptane e.) cyclopentane f.) methyl-cycloheptane g.) 2-pentyne h.) trans-2-octene i.) 4-methylpentene j.) 2,5-dimethyl-3-heptyl k.) cyclopentene l.) *cis-6-dimethyl-7-methyl-3-octene* m.) *ethylbenzene* n.)hexane o.) 3,4-dimethyl heptane p.) propylcyclobutane
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*#19 - image* Draw the structures of the products of each of the following reactants.
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answers: *#19 - image*
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Draw the structures of each of the following compounds: a.) ethyl alcohol b.) 2-pentanol c.) cuclobutanol d.) isopropyl alcohol e.) 1-hexanol
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answers: *#20 - image*
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*#21 - image* Name the following compounds:
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a.) methanol b.) 2-butanol c.) phenol d.) 3-octanol e.) cyclohexanol
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*#22 - image* Are the two molecules constitutional isomers?
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a.) isomer b.) isomers c.) not isomers d.) isomers e.) not isomers f.) not isomers g.) not isomers h.) isomers i.) not isomers j.) not isomers k.) isomers
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*#23 - image* Identify chiral atoms.
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answers: *#23- images*
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If you dissolve 4.0 g of glycerol in enough water to make 100 ml of solution, will this solution be isotonic, hypertonic, or hypotonic?
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4.0 g / (92.09 g/mol) = # of moles # of moles = 0.013 moles Molarity = (0.043 mols / 1 liter) * 100 = *0.43 M* *Hypotonic because it is higher than 0.28 M which of isotonic *
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A solution contains 2.5 g of ethanol in water to give a total volume of 75 mL. Express the concentration as: a.) a percent concentration (w/v) b.) a molarity
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a.) (2.5 g / 75 mL) * 100 = *3.3% w/v* ---- b.) # of moles = (2.5 g / 46 g ) = 0.05 mol (0.05 mol / 0.075 mL) * 1000 = *0.72 M*
question
Ethanol is used in some rubbing alcohol formulas, because it can evaporate readily and cools the skin. The specific heat of ethanol is 0.58g/cal, and the heat of evaporation is 201 cal/g. a.) how much heat is needed to raise the temperature of 25 g of ethanol from 20'C to 37'C? b.) how much heat is needed to evaporate 25 g of ethanol?
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a.) 17'C * 25 g * 0.28 cal/g = *246.5 cal* ---- b.) 25 g * 201 cal/g = *5,025 cal*
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*#24 - image* Name the following compounds:
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a.) 4-octanone b.)butanoic acid c.) hexanal d.) cycloheptanone e.) 3-hexanone f.) propanoic acid g.) hexanal
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*#25 - image* Give the trivial names of the following:
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a.)formaldehyde b.) acetone c.)acetic acid
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*#26 - image* Draw the structures after being oxidized:
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answers: #26 - images
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*#27 - image*Draw the structures after being hydrogenated:
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answer: *#27 - image*
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*#28 - image*Draw the structures after being reduced:
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answer: *#28 - image*
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*#29 - image*State whether the product is chiral to the reactant:
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a.) achiral b.) chiral c.)achiral d.)achiral e.)achiral f.) chiral
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Which of the following are consitional isomers? a.) 2-pentanone and 3-pentanone b.) 2-pentanone and pentanal c.) 2-pentanone and 2-pentanol d.) 2-pentanone and cyclopentanol
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a.)isomers b.)isomers c.)not isomers d.) isomers
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*#30 - image* What is the COMPOUND E after reduction. What is COMPOUND F after dehydration. What is COMPOUND G after hydrogenation.
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answer: *#30 - image*
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*#31 - image* a.) draw the structure of the product that will be formed if the alcohol gorup is oxidized. b.) what is the structure if the aldehyde is oxidized? c.) what is the structure if both are oxidized? _____ d.) draw the structure of the produce that will be formed if the ketone is reduced. e.) what is the structure if the aldehyde group is reduced f.) what is the structure if both are reduced?
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answer: *#31 - image*
question
Which of the redox coenzymes is most likely to be involved in each of the following types of reactions? A.) Alcohol to ketone B.) Alkene to alkane C.) Thiol to disulfide D.) Aldehyde to carboxylic acid
answer
A.) NAD+ B.) NADP+ C.) NAD+ D.) NAD+
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