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Chapter 20

Organic Chemistry

Clicker Questions

Allison SoultUniversity of Kentucky

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What is the general formula for an alkyne?

a) CnH2n+2

b) CnH2n+1

c) CnH2n

d) CnH2n−1

e) CnH2n−2

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Which two are structural isomers?

a) I and IIb) II and IIIc) I and IIId) There are no structural isomers in this set.

I. II. III.

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Which of the following can exhibit optical isomerism?

a) b)

c) d)

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Give the IUPAC name for the branched alkane pictured below.

a) 6-butyl-4-ethyl-3-methylheptane

b) 2-butyl-4-ethyl-5-methylheptane

c) 4-ethyl-3,6-dimethyldecane

d) 7-ethyl-5,8-dimethyldecane

e) 4-ethyl-3,6-methyldecane

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Which of the following compounds is most likely to have only one double bond?

a) b)

c) d)

C6H14

C7H14

C8H14

C9H14

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What is the name of this compound?

a) 1-decene

b) 3-propyl-1-heptene

c) 4-etheneheptane

d) 5-propyl-7-heptene

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Which of the following compounds could exhibit geometric isomerism?

a) b)

c) d)

CH2=CHCH3

CCl2=CF2

CH3CH=CHCH3

CHCl=CF2

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Which class of compounds is the least reactive?

a) alkanes

b) alkenes

c) alkynes

d) They are all the same.

e) There is no trend in the reactivity.

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What is the product when 1-butene reacts with HCl?

a) 2-chlorobutane

b) 1-chlorobutane

c) 1,2-dichlorobutane

d) butane

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Which functional groups are present in the molecule penicillin shown below?

a) Alcohol

b) Amine

c) Ester

d) Carboxylic acid

e) All of the above

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Which of the following is the most oxidized?

a) b)

c) d)

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Which of the following reactions is correct?

a)

b)

c)

d)

e) All are correct

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The artificial banana scent is caused by the molecule shown below. Give the IUPAC name for this molecule.

a) Butyl ethanoate

b) Ethyl pentanoate

c) Methyl pentanoate

d) Pentyl ethanoate

e) Pentyl methanoate

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Ethyl cinnamate (cinnamon fragrance) is produced in the following esterification reaction. Which of the following is the correct structure for ethyl cinnamate?

a)

d)

b)

c)

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Polystyrene is a polymer that is commonly used in packaging and disposable food containers. Identify the monomer from the polymer structure shown below.

a) b) c) d)