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Assignment
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For part of this assignment, you will investigate the 5 common esters found in fruits. Esters are responsible for the sweet
aromas associated with our favorite fruits. The five most common esters that give fruits their sweet aroma are listed for
the first 5 questions. Choose the correct carboxylic acids and alcohols that are needed to produce this five esters. This
assignment also contains questions from chapters 16 and 17.
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QUESTION 1
Isoamyl acetate can be found in bananas and pears. What are the carboxylic acid and alcohol needed
to produce this acetate?
a.
acetic acid and 3-methyl-1-butanol
b.
acetic acid and 3-methylbutanol
c.
isoamyl acid and ethanol.
d.
acetate acid and 3-methyl-1-butanol.
QUESTION 2
For the question(s) that follow, identify the class of lipid to which each of the following molecules belongs.
e.
glycosphingolipid
b. wax
d. glycerophospholipid
c. triacylglycerol
a. steroid
QUESTION 3
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octyl ethanoate can be found in orranges. What are the carboxylic acid and alcohol needed to produce this ester?
a.
ethanoic acid and octyl
b.
ethanoic acid and octanol
c.
octanoic acid and ethanol
d.
ethanoic acid and 1-octanol
QUESTION 4
For the question(s) that follow, identify the class of lipid to which each of the following molecules belongs.
e.
wax
d. glycerophospholipid
b. bile salt
a. steroid
c.
prostaglandin
QUESTION 5
For the question(s) that follow, identify the class of lipid to which each of the following molecules belongs.
d.
prostaglandin
e.
sphingolipid
a. bile salt
c. triacylglycerol
b. wax
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QUESTION 6
QUESTION 7
QUESTION 8
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What is the product of the reaction of pentanoic acid with ethanol in the presence of a strong acid?
a. pentyl ethanoate
c. heptanoic acid
b. ethyl pentanoate
d. pentyl acetate
Give the IUPAC name for the following compound:
a.
ethyl 2-methylbutanoate
b.
3-methylbutyl ethanoate
c.
ethyl 3-methylbutanoate
d.
ethyl methylbutanoate
Hexyl butanoate can be found in apricots, pineapples and apples. What are the carboxylic acid and
alcohol needed to produce this ester?
a.
butanoic acid and 1-hexanol
b.
butanoic acid and 1-hexane
c.
butanoic acid and hexyl
d.
hexanoic and 1-butanol
QUESTION 9
butyl butanoate can be found in apples, bananas, plums, berries and pears. What are the carboxylic
acid and alcohol needed to produce this ester?
a.
butanoate and butyl
b.
butanoic acid and 2-butanol
c.
butanoic acid and 1-butanol
d.
butanoate and 1-butanol
QUESTION 10
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Identify the correct the compound for the ester formed in the following reaction:
a.
A
b.
B
c.
C
d.
D
QUESTION 11
Rank the following compound in increasing order of solubility in water.
1.
acetic acid, 2. butanoic acid, 3. butanoate, 4. butanol and
5. butane a. 1<2<4<3<5
a. 5<3<4<2<1
c. 5<4<3<2<1
d. 4<5<2<3<1
QUESTION 12
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I
2
, like H
2
will react with C=C of triacylglycerol and form two C-I bonds. The process is called iodonation,
which similar to hydrogenation. Identify the product for the iodonation of the following triacylglycerol.
a.
A
b.
B
c.
C
QUESTION 13
Give the IUPAC and common name for the following compound:
a. 3-methylhexanoic acid; beta-methylhexanoic
acid b.. 4-methylhexanoic acid; gama-
methylhexanoic acid
c. 3-methylhexanoic acid; alpha-methylhexanoic acid
a. 4-methylhexanoic acid; beta-methylhexanoic acid
QUESTION 14
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QUESTION 15
Identify each of the specified regions on this phospholipid as polar or nonpolar.
Region
A
Region
B
Region
C
A.
polar
B.
nonpolar
C.
neither
Answer the question(s) that follow about the diagram shown below.
In this diagram of a cell membrane, the small branched object labeled (A) is part of a
a. hydrophobic region.
e. membrane protein.
d. steroid.
b. carbohydrate side chain.
c. glycerophospholipid.
QUESTION 16
Ethyl butanoate can be found in apples. What are the carboxylic acid and alcohol needed to produce this ester?
a.
ethanoic acid and butanol
b.
butanoic acid and ethanol
c.
butanoic acid and ethane
d.
ethanoic acid and butane
QUESTION 17
What kind of intermolecular bonding occurs between carboxylic acids?
d. charge-transfer bonding
c. nonpolar bonding
e. hydrogen bonding
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QUESTION 18
Give the IUPAC and common name for the following compound.
a.
2,4-dibromophneol;
o
,
p
-dibromophenol
b.
3,4-dibromophneol;
m
,
p
-dibromophenol
c.
2,4-dibromobenzoic acid;
o
,
p
-dibromobenzoic acid
d.
3,4-dibromobenzoic acid;
m
,
p
-dibromobenzoic acid
QUESTION 19
Hexyl acetate can be found in many fruits including apples and plums. What are the carboxylic acid and
alcohol needed to produce this acetate?
a.
acetic acid and 1-hexane
b.
acetic acid and 1-hexanol
c.
Hexanoic acid and ethanol
d.
acetate acid and 1-hexanol
QUESTION 20
Rank the following compounds in decreasing order of the boiling points.
1. propanone, 2. propanoic acid, 3. 1-propanol, 4.
propane a. 2>3>1>4
b. 2>1>3>4
b. 1>2>3>4
b. 4>1>3>2
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