Question 1

What is the IUPAC name of the following compound?

Accepted Answer

A) dibromopentane 
B) 2,4-dibromopentane 
C) 2,4-dibromohexane 
D) 2,5-dibromohexane 
E) 1-bromo-2,5-methylbromopentane 
A) dibromopentane 
B) 2,4-dibromopentane 
C) 2,4-dibromohexane 
D) 2,5-dibromohexane 
E) 1-bromo-2,5-methylbromopentane D

Question 2

An alkane used as a lubricant contains 25 carbon atoms.How many hydrogen atoms are present in its structure?

Accepted Answer

A) 25 
B) 27 
C) 50 
D) 52 
E) It is impossible to predict. 
A) 25 
B) 27 
C) 50 
D) 52 
E) It is impossible to predict. D

Question 3

How does the molecular formula of a cycloalkane differ from that of the corresponding alkane?

Accepted Answer

A) The alkane has two fewer hydrogen atoms in its formula. 
B) The cycloalkane has one fewer hydrogen atom in its formula. 
C) The cycloalkane has one fewer carbon in its formula. 
D) The cycloalkane has two fewer hydrogen atoms in its formula. 
E) The alkane has two more carbon atoms in its formula. 
A) The alkane has two fewer hydrogen atoms in its formula. 
B) The cycloalkane has one fewer hydrogen atom in its formula. 
C) The cycloalkane has one fewer carbon in its formula. 
D) The cycloalkane has two fewer hydrogen atoms in its formula. 
E) The alkane has two more carbon atoms in its formula. D

Question 4

The chair and boat conformations of cyclohexane are shown below.Which statement best explains why the chair conformation is more stable than the boat conformation?

Accepted Answer

A) The hydrogen atoms in the chair conformation are all staggered,which minimizes the repulsion of the bonding electrons. 
B) The carbon atoms in the chair conformation are all eclipsed,which provides for the ideal bond angle of 109.5°. 
C) The carbon atoms in the chair conformation are closer together than in the boat conformation,which provides for stronger C-C bonds. 
D) The hydrogen atoms in the chair conformation are closer together than in the boat conformation,which provides for stronger C-H bonds. 
E) The C-C bonds in the chair conformation are all staggered,which maximizes the energy of the molecule. 
A) The hydrogen atoms in the chair conformation are all staggered,which minimizes the repulsion of the bonding electrons. 
B) The carbon atoms in the chair conformation are all eclipsed,which provides for the ideal bond angle of 109.5°. 
C) The carbon atoms in the chair conformation are closer together than in the boat conformation,which provides for stronger C-C bonds. 
D) The hydrogen atoms in the chair conformation are closer together than in the boat conformation,which provides for stronger C-H bonds. 
E) The C-C bonds in the chair conformation are all staggered,which maximizes the energy of the molecule.

Question 5

Which of the following best describes molecules related as conformational isomers?

Accepted Answer

A) same molecular formulas but different bonding patterns between atoms 
B) different molecular formulas but the same connections between atoms 
C) same molecular formulas,the same connections between atoms,but different spatial arrangement of atoms due to rotation around bonds 
D) same molecular formulas but different cis-trans arrangement of atoms 
E) different molecular formulas and different bonding patterns 
A) same molecular formulas but different bonding patterns between atoms 
B) different molecular formulas but the same connections between atoms 
C) same molecular formulas,the same connections between atoms,but different spatial arrangement of atoms due to rotation around bonds 
D) same molecular formulas but different cis-trans arrangement of atoms 
E) different molecular formulas and different bonding patterns

Question 6

What is the IUPAC name of the following compound?

Accepted Answer

A) 2,2-dimethylpropane 
B) 2-methylbutane 
C) dimethylbutane 
D) 2-hydro-2-methylbutane 
E) isopropylethane 
A) 2,2-dimethylpropane 
B) 2-methylbutane 
C) dimethylbutane 
D) 2-hydro-2-methylbutane 
E) isopropylethane

Question 7

Benzene may be represented by the line formula below.What is the molecular formula of benzene?

Accepted Answer

A) C12H6 
B) C6H12 
C) C6H6 
D) C6H14 
E) C6 
A) C12H6 
B) C6H12 
C) C6H6 
D) C6H14 
E) C6

Question 8

Which compound(s)below contain substituents that are trans?

Accepted Answer

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

Question 9

Butanone (structure shown)may be classified as what type of compound?

Accepted Answer

A) aldehyde 
B) ketone 
C) ether 
D) carboxylic acid 
E) ester 
A) aldehyde 
B) ketone 
C) ether 
D) carboxylic acid 
E) ester

Question 10

Which of the following statements concerning conformational isomers is FALSE?

Accepted Answer

A) Conformational isomers are different spatial arrangements of the same molecule,formed by rotation around single bonds. 
B) Conformational isomers rapidly interconvert,and cannot be physically separated from each other. 
C) The staggered and the eclipsed conformation are two types of conformational isomers of alkanes. 
D) The staggered conformation is more stable than the eclipsed conformation,because in the staggered conformation electron repulsion is maximized. 
E) The boat conformation and the chair conformation are two conformational isomers of cyclohexane; the chair conformation is the more stable of the two. 
A) Conformational isomers are different spatial arrangements of the same molecule,formed by rotation around single bonds. 
B) Conformational isomers rapidly interconvert,and cannot be physically separated from each other. 
C) The staggered and the eclipsed conformation are two types of conformational isomers of alkanes. 
D) The staggered conformation is more stable than the eclipsed conformation,because in the staggered conformation electron repulsion is maximized. 
E) The boat conformation and the chair conformation are two conformational isomers of cyclohexane; the chair conformation is the more stable of the two.

Question 11

The propyl group is CH3CH2CH2-.

Accepted Answer

A) True 
 B)False

Question 12

What is the IUPAC name of the compound below?

Accepted Answer

A) methylhexane 
B) methylcyclohexane 
C) toluene 
D) hexylmethane 
E) methylbenzene 
A) methylhexane 
B) methylcyclohexane 
C) toluene 
D) hexylmethane 
E) methylbenzene

Question 13

What is the IUPAC name of the following compound?

Accepted Answer

A) 2,4,4-trimethylpentane 
B) 2,2,4-octane 
C) 2,2,4-trimethylpentane 
D) trimethylpentane 
E) None of the choices are correct. 
A) 2,4,4-trimethylpentane 
B) 2,2,4-octane 
C) 2,2,4-trimethylpentane 
D) trimethylpentane 
E) None of the choices are correct.

Question 14

What is the IUPAC name of the following compound?

Accepted Answer

A) 3-ethylpentane 
B) 3-methylheptane 
C) 1,4-dimethylpentane 
D) 3-ethylheptane 
E) 2-methyl-diethylmethane 
A) 3-ethylpentane 
B) 3-methylheptane 
C) 1,4-dimethylpentane 
D) 3-ethylheptane 
E) 2-methyl-diethylmethane

Question 15

A cycloalkane molecule contains 8 carbon atoms.How many hydrogen atoms are present in the molecule?

Accepted Answer

A) 4 
B) 8 
C) 14 
D) 16 
E) 18 
A) 4 
B) 8 
C) 14 
D) 16 
E) 18

Question 16

How many secondary and tertiary carbons,respectively,are in the following compound?

Accepted Answer

A) 2,4 
B) 2,3 
C) 3,3 
D) 3,4 
E) 5,3 
A) 2,4 
B) 2,3 
C) 3,3 
D) 3,4 
E) 5,3

Question 17

Which type of compound is NOT classified as an aliphatic hydrocarbon?

Accepted Answer

A) alkyne 
B) aromatic 
C) cycloalkane 
D) alkene 
E) alkane 
A) alkyne 
B) aromatic 
C) cycloalkane 
D) alkene 
E) alkane

Question 18

What is the correct classification for the compound shown below?

Accepted Answer

A) alcohol 
B) aldehyde 
C) carboxylic acid 
D) ester 
E) ketone 
A) alcohol 
B) aldehyde 
C) carboxylic acid 
D) ester 
E) ketone

Question 19

The carbonyl group is a functional group found in many different types of compounds.What is the general structure of the carbonyl group?

Accepted Answer

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

Question 20

Which of the following is NOT a characteristic associated with undecane,an 11-carbon straight chain alkane?

Accepted Answer

A) hydrogen bonding 
B) low water solubility 
C) density less than water 
D) flammable liquid 
E) nonpolar 
A) hydrogen bonding 
B) low water solubility 
C) density less than water 
D) flammable liquid 
E) nonpolar

Exam 10: An Introduction to Organic Chemistry

What is the IUPAC name of the following compound?

An alkane used as a lubricant contains 25 carbon atoms.How many hydrogen atoms are present in its structure?

How does the molecular formula of a cycloalkane differ from that of the corresponding alkane?

The chair and boat conformations of cyclohexane are shown below.Which statement best explains why the chair conformation is more stable than the boat conformation?

Which of the following best describes molecules related as conformational isomers?

What is the IUPAC name of the following compound?

Benzene may be represented by the line formula below.What is the molecular formula of benzene?

Which compound(s)below contain substituents that are trans?

Butanone (structure shown)may be classified as what type of compound?

Which of the following statements concerning conformational isomers is FALSE?

The propyl group is CH3CH2CH2-.

What is the IUPAC name of the compound below?

What is the IUPAC name of the following compound?

What is the IUPAC name of the following compound?

A cycloalkane molecule contains 8 carbon atoms.How many hydrogen atoms are present in the molecule?

How many secondary and tertiary carbons,respectively,are in the following compound?

Which type of compound is NOT classified as an aliphatic hydrocarbon?

What is the correct classification for the compound shown below?

The carbonyl group is a functional group found in many different types of compounds.What is the general structure of the carbonyl group?

Which of the following is NOT a characteristic associated with undecane,an 11-carbon straight chain alkane?

Chemistry - Methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

The propyl group is CH₃CH₂CH₂-.