Question 1

What are constitutional isomers?

Accepted Answer

Constitutional isome...

Question 2

What is angle strain in cycloalkanes?

Accepted Answer

A)  Angle strain is the angle between carbon bonds on the outer side of a cycloalkane ring.
B)  Angle strain is the difference between an ideal bond angle for sp3 hybridized carbon atoms and the actual bond angle in the ring.
C)  Angle strain is the difference between and ideal bond angle for sp hybridized carbon atoms and the actual bond angle in the ring.
D)  Angle strain is the angle between C-C bonds in the cycloalkane ring.
E)  Angle strain is the difference between the C-C bond angles found in a flat ring structure and in an actual ring structureF) B) and D)
G) C) and D)

Question 3

Which of the following compounds contain an acyl group?

Accepted Answer

A)  esters, ethers, carboxylic acids
B)  esters, carboxylic acids, amines
C)  esters, carboxylic acids, amides
D)  esters, alcohols, amines
E)  ethers, amides, estersF) C) and D)
G) A) and B)

Question 4

Why are there so many more carbon compounds than the number of compounds made up of all the rest of the elements combined?

Accepted Answer

Carbon has the ability to form...

Question 5

What is the difference between the R/ S designation and d/l designation of chiral compounds?

Accepted Answer

The R/S system gives the absolute config...

Question 6

Which of the following statements correctly describes organic halides?

Accepted Answer

A)  Organic halides have one or more H atoms substituted by an electronegative atom from group 16 of the periodic table.
B)  Organic halides have one or more C atoms substituted by an electronegative atom from group 17 of the periodic table.
C)  Organic halides have one or more H atoms substituted by an electronegative atom from group 17 of the periodic table.
D)  Organic halides have one or more H atoms substituted by an electropositive atom from group 17 of the periodic table.
E)  Organic halides have one or more H atoms substituted by an electronegative atom from group 7 of the periodic table.F) All of the above
G) C) and D)

Question 7

Determine the absolute configuration of the molecule shown below:

Accepted Answer

A)  S configuration
B)  R configuration
C)  E configuration
D)  Z configuration
E)  d configurationF) A) and C)
G) A) and B)

Question 8

Which of the following is TRUE regarding stereoisomers?

Accepted Answer

A)  Stereoisomers differ in the way atoms are connected but have identical spatial orientation of atoms. They can be conformational or configurational.
B)  Stereoisomers differ in the way atoms are connected but have identical spatial orientation of atoms. They can be constitutional or configurational.
C)  Stereoisomers have the same atom connectivity but have different spatial orientation of atoms. They can be constitutional or enantiomeric.
D)  Stereoisomers have the same atom connectivity but have different spatial orientation of atoms. They can be conformational or configurational.
E)  Stereoisomers have the same atom connectivity but have different functional groups on the same positions of the carbon backbone. They can be conformational or configurational.F) B) and C)
G) None of the above

Question 9

How many isomers are there for C5H12 ?

Accepted Answer

A)  3
B)  4
C)  5
D)  6E) B) and C)
F) A) and D)

Question 10

Which of the following statements is TRUE?

Accepted Answer

A)  Infrared absorption spectroscopy is a common method for identifying functional groups in the structure of organic molecules.
B)  Infrared absorption spectroscopy is a technique that makes use of the fact that infrared photons can excite the valence electrons in organic molecules.
C)  Infrared absorption spectroscopy is a simple yet powerful method for determining the absolute configuration of chiral organic molecules.
D)  Infrared absorption spectroscopy observes the energy emitted by vibrating bonds in molecules.
E)  Infrared absorption spectroscopy is a technique frequently used in separation of isomers.F) D) and E)
G) B) and E)

Question 11

Which of the following compounds exhibits optical isomerism?

Accepted Answer

A)  CH3-CH2-CH3
B)  CH3-CH2-CHBr-CH3
C)  CH3-CHCl-CH3
D)  CH3-CH2-CH2Br
E)  CH3-CH2-CBr2-CH3F) None of the above
G) A) and B)

Question 12

Which one of the following molecules is the most polar?

Accepted Answer

A)  butane
B)  butanoic acid
C)  cyclohexane
D)  ethanolE) A) and B)
F) A) and C)

Question 13

Which compound is a saturated hydrocarbon?

Accepted Answer

A)  1-butyne
B)  cycloheptene
C)  3-methylheptane
D)  2-heptyneE) All of the above
F) C) and D)

Question 14

Which of the following acyclic compounds is an alkane?

Accepted Answer

A)  C10H22
B)  C11H22
C)  C12H22
D)  C5H10
E)  C5H8F) C) and E)
G) A) and B)

Question 15

Which of the following lists the substituents in the order of priority, from highest (priority 1) to lowest (priority 4) ?

Accepted Answer

A)  -NH2, -C(=O) H, -COOH, -CH3
B)  -CH3, -COOH, -C(=O) H, -NH2
C)  -NH2, -CH3, -C(=O) H, -COOH
D)  -NH2, -COOH, -C(=O) H, -CH3
E)  -NH2, -CH3, -COOH, -C(=O) HF) A) and B)
G) None of the above

Question 16

Which of the following structures is S-2-chlorobutane?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) D) and E)

Question 17

Which of the following compounds is an amine?

Accepted Answer

A)  (CH3CH2) 2NH
B)  CH3CH2CH2CH2CO2CH3
C)  CH3CH2CH2CH2-O-CH2CH2CH3
D)  CH3CH=O
E)  CH3COCH3F) A) and B)
G) B) and E)

Question 18

What is the maximum number of covalent bonds that a carbon atom can form?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) B) and E)
G) A) and B)

Question 19

Which of the following compounds is a ketone?

Accepted Answer

A)   CH3CH2CH2CO2H
B)   3CH2CH2CO2H 
B)     
C)   CH3CH2NH2 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   CH3CH2NH2
D)   3CH2CH2CO2H 
B)     
C)   CH3CH2NH2 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   3CH2CH2CO2H 
B)     
C)   CH3CH2NH2 
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and B)
G) A) and E)

Question 20

Which of the following sets of compounds contain one ether, one alcohol, and one ketone (not necessarily in this order) ?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and D)
G) All of the above

Exam 20: Organic Chemistry I: Structures

How many isomers are there for C5H12 ?

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Which of the following compounds is a ketone?

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Which of the following acyclic compounds is an alkane?

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Which compound is a saturated hydrocarbon?

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Which of the following compounds exhibits optical isomerism?

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Determine the absolute configuration of the molecule shown below:

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Which of the following is TRUE regarding stereoisomers?

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What is the difference between the R/ S designation and d/l designation of chiral compounds?

Correct AnswerverifiedThe R/S system gives the absolute config...View AnswerShow Answer

Which of the following statements is TRUE?

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Which of the following compounds is an amine?

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Which of the following compounds contain an acyl group?

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What is angle strain in cycloalkanes?

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Which of the following structures is S-2-chlorobutane?

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Why are there so many more carbon compounds than the number of compounds made up of all the rest of the elements combined?

Correct AnswerverifiedCarbon has the ability to form...View AnswerShow Answer

Which one of the following molecules is the most polar?

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Which of the following lists the substituents in the order of priority, from highest (priority 1) to lowest (priority 4) ?

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What is the maximum number of covalent bonds that a carbon atom can form?

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What are constitutional isomers?

Correct AnswerverifiedConstitutional isome...View AnswerShow Answer

Which of the following sets of compounds contain one ether, one alcohol, and one ketone (not necessarily in this order) ?

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Which of the following statements correctly describes organic halides?

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How many isomers are there for C₅H₁₂ ?

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The R/S system gives the absolute config...
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Carbon has the ability to form...
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Constitutional isome...
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