Question 1

There is growing evidence that "trans" fats are associated with an increased risk of ___,and the FDA now requires "trans fat" information to be provided on nutrition labels.

Accepted Answer

cardiovasc...

Question 2

Which of these reagents would not react with stearic acid?

Accepted Answer

A)  H2,Ni
B)  SOCl2
C)  CH3MgI
D)  NH3/H2O
E)  LAH (lithium aluminum hydride) F) B) and C)
G) A) and D)

Question 3

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5 ∞\infty∞ -cholest-1-en-3-one and 5 ∞\infty∞ -cholestan-3-one?

Accepted Answer

A)  Ag(NH3) 2+
B)  CrO3/H2SO4
C)  Br2/CCl4
D)  NaOH/H2O
E)  C6H5NHNH2 F) A) and B)
G) B) and D)

Question 4

What would be the product,X,of the following reaction sequence? 3(CH2) 11CH2NH2 D) CH3(CH2) 12CONH2 E) CH3(CH2) 12COBr" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   3(CH2) 11CH2NH2 
D)  CH3(CH2) 12CONH2 
E)  CH3(CH2) 12COBr" class="answers-bank-image d-inline" rel="preload" >
B)   3(CH2) 11CH2NH2 
D)  CH3(CH2) 12CONH2 
E)  CH3(CH2) 12COBr" class="answers-bank-image d-inline" rel="preload" >
C)  CH3(CH2) 11CH2NH2
D)  CH3(CH2) 12CONH2
E)  CH3(CH2) 12COBrF) A) and B)
G) A) and E)

Question 5

Which is the correct systematic name for the steroid shown below?

Accepted Answer

A)  5 ∞\infty∞ -Androstan-3 ∞\infty∞ -ol
B)  5 β\betaβ -Androstan-3 β\betaβ -ol
C)  5 β\betaβ -Androstan-3 ∞\infty∞ -ol
D)  5 ∞\infty∞ -Androstan-3 β\betaβ -ol
E)  5 β\betaβ -Estan-3 β\betaβ -ol F) C) and D)
G) A) and D)

Question 6

Draw the structures of these molecules:
a)glyceryl trimyristate
b)methyl oleate
c)α-pinene
d)dihydrocarvone

Accepted Answer

The answer of Draw the structures of these molecules:
a)glyceryl trimyristate
b)methyl...

Question 7

The 1H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).

Accepted Answer

Assign. Shift(ppm)
...

Question 8

The product of the following reaction sequence may be described as?

Accepted Answer

A)  Alkoxyalkane
B)  Alkyl alkanoate
C)  Alkyl alkenoate
D)  Acyl glycerol
E)  Acyl AlkaneF) C) and D)
G) A) and B)

Question 9

In the vulcanization of rubber,

Accepted Answer

A)  natural rubber is heated with sulfur.
B)  reaction occurs at allylic positions.
C)  cross-linking results in a hardening of the rubber.
D)  disulfide bridges are formed.
E)  All of these choices.F) A) and B)
G) A) and C)

Question 10

Which fatty acid is not likely to occur commonly in natural sources?

Accepted Answer

A)  Tetradecanoic acid
B)  Pentadecanoic acid
C)  Hexadecanoic acid
D)  (9Z,12Z) -octadeca-9,12-dienoic acid
E)  (Z) -hexadeca-9-enoic acidF) All of the above
G) B) and D)

Question 11

What of the following solvents would dissolve triacylglycerols?

Accepted Answer

A)  Water and chloroform
B)  Acetic acid and water
C)  Chloroform and diethyl ether
D)  Aqueous NaOH and acetic acid
E)  They are soluble in water onlyF) A) and B)
G) A) and C)

Question 12

Explain why oils are liquid at room temperature while fats are solid.

Accepted Answer

Triacylglycerides in oils contain cis-do...

Question 13

A simple triacylglycerol is one that:

Accepted Answer

A)  Upon hydrolysis produces glycerol and three different fatty acids.
B)  Upon hydrolysis produces glycerol and at least two different fatty acids.
C)  Upon saponification gives glycerol and three fatty acid salts.
D)  Upon saponification gives three esters.
E)  Upon hydrolysis produces glycerol and three mol of a fatty acid.F) B) and D)
G) B) and E)

Question 14

Essential oils are constituted by

Accepted Answer

A)  fatty acids and glycerol
B)  triacylglycerol
C)  terpenes only
D)  glycerol
E)  terpenoids and terpenesF) B) and D)
G) All of the above

Question 15

When natural rubber is heated with sulfur,a reaction takes place that produces ___ between the polymer chains.This process is known as ___.

Accepted Answer

cross-link...

Question 16

How many isomers,including stereoisomers,exist for the triacylglycerol which,on saponification,gives glycerol,2 molar equivalents of palmitate and 1 molar equivalent of stearate?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  6F) B) and C)
G) A) and E)

Question 17

Show all isoprene units in the following structures:

Accepted Answer

The answer of Show all isoprene units in the following...

Question 18

One of the products of hydrolysis of a wax gave the following 1H NMR spectrum,ppm (integral) : 3.62(2) ; 1.58(2) ,1.45(2) ; 1.27(50) ; 0.88(3) .The molecular weight is 410.8 amu. What is the compound?

Accepted Answer

A)  CH3(CH2) 5CH2OH
B)  CH3(CH2) 25CH2OH
C)  CH3(CH2) 25CH2CH2OH
D)  (CH3) 2CH(CH2) 24CH2OH
E)  CH3(CH2) 25 CH2CO2HF) A) and D)
G) None of the above

Question 19

Which of the following statements regarding triacylglycerols is not true?

Accepted Answer

A)  They undergo alkaline hydrolysis to yield soaps.
B)  They are liquid if they have alkene groups.
C)  They are solid if they do not have one or more alkene groups.
D)  They are soluble in water.
E)  Some can be hydrogenated.F) None of the above
G) B) and E)

Question 20

Which of these is a wax?

Accepted Answer

A)   3(CH2) 24CH2OH" class="answers-bank-image d-inline" rel="preload" >
B)   3(CH2) 24CH2OH" class="answers-bank-image d-inline" rel="preload" >
C)   3(CH2) 24CH2OH" class="answers-bank-image d-inline" rel="preload" >
D)   3(CH2) 24CH2OH" class="answers-bank-image d-inline" rel="preload" >
E)  CH3(CH2) 24CH2OHF) None of the above
G) A) and B)

Exam 23: Lipids

Which of these is a wax?

Correct Answer
verified

Which of these reagents would not react with stearic acid?

Correct Answer
verified

How many isomers,including stereoisomers,exist for the triacylglycerol which,on saponification,gives glycerol,2 molar equivalents of palmitate and 1 molar equivalent of stearate?

Correct Answer
verified

Essential oils are constituted by

Correct Answer
verified

What would be the product,X,of the following reaction sequence?

Correct Answer
verified

There is growing evidence that "trans" fats are associated with an increased risk of ___,and the FDA now requires "trans fat" information to be provided on nutrition labels.

Correct Answer
verified
cardiovasc...
View Answer

When natural rubber is heated with sulfur,a reaction takes place that produces _ between the polymer chains.This process is known as _.

Correct Answer
verified
cross-link...
View Answer

One of the products of hydrolysis of a wax gave the following ¹H NMR spectrum,ppm (integral) : 3.62(2) ; 1.58(2) ,1.45(2) ; 1.27(50) ; 0.88(3) .The molecular weight is 410.8 amu. What is the compound?

Correct Answer
verified

The product of the following reaction sequence may be described as?

Correct Answer
verified

The ¹H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).

Correct Answer
verified
Assign. Shift(ppm)
...
View Answer

What of the following solvents would dissolve triacylglycerols?

Correct Answer
verified

Correct Answer
verified

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5 $\infty$ -cholest-1-en-3-one and 5 $\infty$ -cholestan-3-one?

Correct Answer
verified

Show all isoprene units in the following structures:

Correct Answer
verified

In the vulcanization of rubber,

Correct Answer
verified

Explain why oils are liquid at room temperature while fats are solid.

Correct Answer
verified
Triacylglycerides in oils contain cis-do...
View Answer

Which fatty acid is not likely to occur commonly in natural sources?

Correct Answer
verified

Draw the structures of these molecules: a)glyceryl trimyristate b)methyl oleate c)α-pinene d)dihydrocarvone

Correct Answer
verified

A simple triacylglycerol is one that:

Correct Answer
verified

Which of the following statements regarding triacylglycerols is not true?

Correct Answer
verified

Exam 23: Lipids

Which of these is a wax?

Correct AnswerverifiedShow Answer

Which of these reagents would not react with stearic acid?

Correct AnswerverifiedShow Answer

How many isomers,including stereoisomers,exist for the triacylglycerol which,on saponification,gives glycerol,2 molar equivalents of palmitate and 1 molar equivalent of stearate?

Correct AnswerverifiedShow Answer

Essential oils are constituted by

Correct AnswerverifiedShow Answer

What would be the product,X,of the following reaction sequence?

Correct AnswerverifiedShow Answer

There is growing evidence that "trans" fats are associated with an increased risk of ___,and the FDA now requires "trans fat" information to be provided on nutrition labels.

Correct Answerverifiedcardiovasc...View AnswerShow Answer

When natural rubber is heated with sulfur,a reaction takes place that produces ___ between the polymer chains.This process is known as ___.

Correct Answerverifiedcross-link...View AnswerShow Answer

One of the products of hydrolysis of a wax gave the following 1H NMR spectrum,ppm (integral) : 3.62(2) ; 1.58(2) ,1.45(2) ; 1.27(50) ; 0.88(3) .The molecular weight is 410.8 amu. What is the compound?

Correct AnswerverifiedShow Answer

The product of the following reaction sequence may be described as?

Correct AnswerverifiedShow Answer

The 1H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).

Correct Answerverified Assign. Shift(ppm)...View AnswerShow Answer

What of the following solvents would dissolve triacylglycerols?

Correct AnswerverifiedShow Answer

Which is the correct systematic name for the steroid shown below?

Correct AnswerverifiedShow Answer

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5 ∞\infty∞ -cholest-1-en-3-one and 5 ∞\infty∞ -cholestan-3-one?

Correct AnswerverifiedShow Answer

Show all isoprene units in the following structures:

Correct AnswerverifiedShow Answer

In the vulcanization of rubber,

Correct AnswerverifiedShow Answer

Explain why oils are liquid at room temperature while fats are solid.

Correct AnswerverifiedTriacylglycerides in oils contain cis-do...View AnswerShow Answer

Which fatty acid is not likely to occur commonly in natural sources?

Correct AnswerverifiedShow Answer

Draw the structures of these molecules: a)glyceryl trimyristate b)methyl oleate c)α-pinene d)dihydrocarvone

Correct AnswerverifiedShow Answer

A simple triacylglycerol is one that:

Correct AnswerverifiedShow Answer

Which of the following statements regarding triacylglycerols is not true?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
cardiovasc...
View Answer

When natural rubber is heated with sulfur,a reaction takes place that produces _ between the polymer chains.This process is known as _.

Correct Answer
verified
cross-link...
View Answer

One of the products of hydrolysis of a wax gave the following ¹H NMR spectrum,ppm (integral) : 3.62(2) ; 1.58(2) ,1.45(2) ; 1.27(50) ; 0.88(3) .The molecular weight is 410.8 amu. What is the compound?

Correct Answer
verified

Correct Answer
verified

The ¹H NMR spectrum shown is for trimyristine.Draw the structure of trimyristine and assign the signals in the spectrum to the different types of protons.Chemical shifts in ppm and integral ratios (in parentheses)are: 5.26 (1H); 4.22 (2H); 2.30 (2H); 1.61 (2H); 1.26 (20H); 0.88 (3H).

Correct Answer
verified
Assign. Shift(ppm)
...
View Answer

Correct Answer
verified

Correct Answer
verified

Which reagent might serve as the basis for a simple chemical test that would distinguish between 5 $\infty$ -cholest-1-en-3-one and 5 $\infty$ -cholestan-3-one?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Triacylglycerides in oils contain cis-do...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified