Question 1

Which compound has the lowest melting point?

Accepted Answer

A) CH3CH2CH2CH2CH3 
B) CH3CH2CH2CH2CH2CH2CH2CH3 
C) CH3CH2CH2CH2CH2CH3 
D) CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 
A) CH3CH2CH2CH2CH3 
B) CH3CH2CH2CH2CH2CH2CH2CH3 
C) CH3CH2CH2CH2CH2CH3 
D) CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3

Question 2

There are _____ constitutional isomers for the five-carbon alkane, each having molecular formula C5H12.

Accepted Answer

Question 3

Which alkane has the lowest boiling point?

Accepted Answer

A) octane 
B) butane 
C) ethane 
D) hexane 
E) propane 
A) octane 
B) butane 
C) ethane 
D) hexane 
E) propane

Question 4

The molecule below contains 1°, 2°, and 3°carbon atoms, but no 4° carbon atoms.

Accepted Answer

A) True 
 B)False

Question 5

Which formula represents an acyclic alkane?

Accepted Answer

A) C10H18 
B) C9H18 
C) C12H26 
D) C10H20 
E) C12H28 
A) C10H18 
B) C9H18 
C) C12H26 
D) C10H20 
E) C12H28

Question 6

What is the classification of the carbon atom that bonded to the -OH group in menthol?

Accepted Answer

A) primary 
B) secondary 
C) tertiary 
D) quaternary 
A) primary 
B) secondary 
C) tertiary 
D) quaternary

Question 7

How many quaternary carbons are in this molecule?

Accepted Answer

A) 0 
B) 1 
C) 4 
D) 5 
A) 0 
B) 1 
C) 4 
D) 5

Question 8

The IUPAC name of an organic compound can be long and complex. As a result, most drugs have three names: _____, _____, and _____.

Accepted Answer

systematic

Question 9

The molecules below are constitutional isomers.

Accepted Answer

A) True 
 B)False

Question 10

Which is NOT a property associated with tetradecane, a 14-carbon straight chain alkane?

Accepted Answer

A) strong hydrogen bonds 
B) low water solubility 
C) density less than water 
D) flammable liquid 
A) strong hydrogen bonds 
B) low water solubility 
C) density less than water 
D) flammable liquid

Question 11

The combustion of alkanes and other hydrocarbons obtained from fossil fuels adds a tremendous amount of CO2 to the atmosphere each year.

Accepted Answer

A) True 
 B)False

Question 12

What is the IUPAC name of this compound?

Accepted Answer

A) ethyl-methyl-cyclopropane 
B) ethyl-2-methylcyclobutane 
C) 1-ethyl-2-methylcyclobutane 
D) 1-ethyl-2-methylcyclopropane 
E) ethyl-2-methylcyclotriane 
A) ethyl-methyl-cyclopropane 
B) ethyl-2-methylcyclobutane 
C) 1-ethyl-2-methylcyclobutane 
D) 1-ethyl-2-methylcyclopropane 
E) ethyl-2-methylcyclotriane

Question 13

Natural gas is composed primarily of propane.

Accepted Answer

A) True 
 B)False

Question 14

All organic molecules must have at least one primary carbon atom.

Accepted Answer

A) True 
 B)False

Question 15

Which molecule is a constitutional isomer of the compound (CH3)2CH(CH2)2CH3?

Accepted Answer

A) CH3CH2CH2CH(CH3)2 
B)    
C)    
D) CH3CH2CH2CH2CH3 
A) CH3CH2CH2CH(CH3)2 
B)    
C)    
D) CH3CH2CH2CH2CH3

Question 16

How many hydrogen atoms are present in an acyclic alkane with five (5)carbon atoms?

Accepted Answer

A) 5 
B) 7 
C) 9 
D) 10 
E) 12 
A) 5 
B) 7 
C) 9 
D) 10 
E) 12

Question 17

The molecule below has _____ primary carbon atoms, _____ secondary carbon atoms, _____ tertiary carbon atoms, and _____ quaternary carbon atoms.

Accepted Answer

5 or five,

Question 18

The IUPAC name of the compound below is _____.

Accepted Answer

3, 3-dieth

Question 19

Which structure depicts an alkane of molecular formula C6H12 that has two 1° carbons and two 3° carbons?

Accepted Answer

A)    
B) CH3CH2CH2CH2CH2CH3 
C)    
D)    
A)    
B) CH3CH2CH2CH2CH2CH3 
C)    
D)

Question 20

The molecular formula for an alkane with 12 carbon atoms and two rings is C12H24.

Accepted Answer

A) True 
 B)False

Exam 12: Alkanes

Which compound has the lowest melting point?

There are _____ constitutional isomers for the five-carbon alkane, each having molecular formula C5H12.

Which alkane has the lowest boiling point?

The molecule below contains 1°, 2°, and 3°carbon atoms, but no 4° carbon atoms.

Which formula represents an acyclic alkane?

What is the classification of the carbon atom that bonded to the -OH group in menthol?

How many quaternary carbons are in this molecule?

The IUPAC name of an organic compound can be long and complex. As a result, most drugs have three names: _____, _____, and _____.

The molecules below are constitutional isomers.

Which is NOT a property associated with tetradecane, a 14-carbon straight chain alkane?

The combustion of alkanes and other hydrocarbons obtained from fossil fuels adds a tremendous amount of CO2 to the atmosphere each year.

What is the IUPAC name of this compound?

Natural gas is composed primarily of propane.

All organic molecules must have at least one primary carbon atom.

Which molecule is a constitutional isomer of the compound (CH3)2CH(CH2)2CH3?

How many hydrogen atoms are present in an acyclic alkane with five (5)carbon atoms?

The molecule below has _____ primary carbon atoms, _____ secondary carbon atoms, _____ tertiary carbon atoms, and _____ quaternary carbon atoms.

The IUPAC name of the compound below is _____.

Which structure depicts an alkane of molecular formula C6H12 that has two 1° carbons and two 3° carbons?

The molecular formula for an alkane with 12 carbon atoms and two rings is C12H24.

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Gases, Liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids, Esters, and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids, Proteins, and Enzymes

Nucleic Acids and Protein Synthesis

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

Filters

There are _____ constitutional isomers for the five-carbon alkane, each having molecular formula C₅H₁₂.

The IUPAC name of an organic compound can be long and complex. As a result, most drugs have three names: ___, _, and ___.

The combustion of alkanes and other hydrocarbons obtained from fossil fuels adds a tremendous amount of CO₂ to the atmosphere each year.

Which molecule is a constitutional isomer of the compound (CH₃)₂CH(CH₂)₂CH₃?

The molecule below has ___ primary carbon atoms, _ secondary carbon atoms, _ tertiary carbon atoms, and ___ quaternary carbon atoms.

Which structure depicts an alkane of molecular formula C₆H₁₂ that has two 1° carbons and two 3° carbons?

The molecular formula for an alkane with 12 carbon atoms and two rings is C₁₂H₂₄.