Question 1

Which of the following pairs of organic compound families could have constitutional isomers?

Accepted Answer

A) an ether and an alcohol 
B) an amide and an amine 
C) an ether and a carboxylic acid 
D) a carboxylic acid and an amide 
E) an amine and an alcohol 
A) an ether and an alcohol 
B) an amide and an amine 
C) an ether and a carboxylic acid 
D) a carboxylic acid and an amide 
E) an amine and an alcohol A

Question 2

Which one of the following structures belongs to the amide family?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E) 
  A

Question 3

Which one of the following molecules is the most polar?

Accepted Answer

A) butane 
B) butanoic acid 
C) cyclohexane 
D) ethanol 
A) butane 
B) butanoic acid 
C) cyclohexane 
D) ethanol B

Question 4

Which of the following is a constitutional isomer of the following organic molecule?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 5

Which of the following functional groups is found in amines?

Accepted Answer

A) -C≡N 
B) -NO2 
C) -NH2 
D) -N≡N 
E) -N=NH 
A) -C≡N 
B) -NO2 
C) -NH2 
D) -N≡N 
E) -N=NH

Question 6

In which of the following structures have the group priorities been assigned correctly?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 7

What are constitutional isomers?

Accepted Answer

Constitutional isome

Question 8

Which of the following compounds is a ketone?

Accepted Answer

A)  CH3CH2CH2CO2H 
B) 
  
C)  CH3CH2NH2 
D) 
  
E) 
  
A)  CH3CH2CH2CO2H 
B) 
  
C)  CH3CH2NH2 
D) 
  
E)

Question 9

Which of the following Newman projections shows an antistaggered conformation of n-pentane?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 10

Which of the following is TRUE regarding index of hydrogen deficiency (IHD)?

Accepted Answer

A) When calculating IHD,oxygen does not change the number of H atoms in the parent formula,halogens are considered equal to hydrogen,and nitrogen requires one additional hydrogen atom in the parent formula. 
B) When calculating IHD,oxygen requires one additional hydrogen atom in the parent formula,halogens are considered equal to hydrogen,and nitrogen does not change the number of H atoms in the parent formula. 
C) When calculating IHD,oxygen is treated like hydrogen,halogens require one additional hydrogen atom in the parent formula,and nitrogen does not change the number of H atoms in the parent formula. 
D) When calculating IHD,oxygen does not change the number of H atoms in the parent formula,halogens are considered equal to hydrogen,and nitrogen requires two additional hydrogen atoms in the parent formula. 
E) When calculating IHD,oxygen and halogens do not change the number of H atoms in the parent formula,and nitrogen requires two additional hydrogen atoms in the parent formula. 
A) When calculating IHD,oxygen does not change the number of H atoms in the parent formula,halogens are considered equal to hydrogen,and nitrogen requires one additional hydrogen atom in the parent formula. 
B) When calculating IHD,oxygen requires one additional hydrogen atom in the parent formula,halogens are considered equal to hydrogen,and nitrogen does not change the number of H atoms in the parent formula. 
C) When calculating IHD,oxygen is treated like hydrogen,halogens require one additional hydrogen atom in the parent formula,and nitrogen does not change the number of H atoms in the parent formula. 
D) When calculating IHD,oxygen does not change the number of H atoms in the parent formula,halogens are considered equal to hydrogen,and nitrogen requires two additional hydrogen atoms in the parent formula. 
E) When calculating IHD,oxygen and halogens do not change the number of H atoms in the parent formula,and nitrogen requires two additional hydrogen atoms in the parent formula.

Question 11

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. 
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.

Question 12

Explain the formation of triple bonds in alkynes.Make sure to mention the hybridization of carbon atoms.

Accepted Answer

The C-C triple bond is made of one σ and

Question 13

Which of the following compounds is an ester?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 14

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

Question 15

Which of the following structures is R-but-3-en-2-ol?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 16

Which of the following is a primary alcohol?

Accepted Answer

A) CH3CH2OH 
B) (CH3)2CHOH 
C) (CH3)3COH 
D) (CH3)2CHCH(CH3)OH 
E) CH3OCH3 
A) CH3CH2OH 
B) (CH3)2CHOH 
C) (CH3)3COH 
D) (CH3)2CHCH(CH3)OH 
E) CH3OCH3

Question 17

Which of the following organic families contains nonpolar compounds?

Accepted Answer

A) carboxylic acids 
B) alcohols 
C) amines 
D) esters 
E) ethers 
A) carboxylic acids 
B) alcohols 
C) amines 
D) esters 
E) ethers

Question 18

What is meant by the term,"structural isomer"?

Accepted Answer

Structural isomers are compoun

Question 19

The infrared spectrum of a compound with molecular formula C4H8O has weak peaks around 1650 cm-1 and a very broad,medium intensity peak around 3350 cm-1.What is the most likely structure of this compound?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 20

Which of the following acyclic compounds is an alkene with one double bond in its structure?

Accepted Answer

A) C10H22 
B) C11H22 
C) C12H22 
D) C6H10 
E) C5H8 
A) C10H22 
B) C11H22 
C) C12H22 
D) C6H10 
E) C5H8

Exam 20: Organic Chemistry I: Structures

Which of the following pairs of organic compound families could have constitutional isomers?

Which one of the following structures belongs to the amide family?

Which one of the following molecules is the most polar?

Which of the following is a constitutional isomer of the following organic molecule?

Which of the following functional groups is found in amines?

In which of the following structures have the group priorities been assigned correctly?

What are constitutional isomers?

Which of the following compounds is a ketone?

Which of the following Newman projections shows an antistaggered conformation of n-pentane?

Which of the following is TRUE regarding index of hydrogen deficiency (IHD)?

Which of the following statements is TRUE?

Explain the formation of triple bonds in alkynes.Make sure to mention the hybridization of carbon atoms.

Which of the following compounds is an ester?

Which of the following compounds contain an acyl group?

Which of the following structures is R-but-3-en-2-ol?

Which of the following is a primary alcohol?

Which of the following organic families contains nonpolar compounds?

What is meant by the term,"structural isomer"?

The infrared spectrum of a compound with molecular formula C4H8O has weak peaks around 1650 cm-1 and a very broad,medium intensity peak around 3350 cm-1.What is the most likely structure of this compound?

Which of the following acyclic compounds is an alkene with one double bond in its structure?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules,compounds,and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

The infrared spectrum of a compound with molecular formula C₄H₈O has weak peaks around 1650 cm^-1 and a very broad,medium intensity peak around 3350 cm^-1.What is the most likely structure of this compound?