Question 1

Which name represents a valid IUPAC name for an alkane?

Accepted Answer

A) 1, 4-diethylheptane 
B) 4, 4-diethyl-2, 3, 4-trimethylpentane 
C) 4, 4-diethyl-2, 3, 4-trimethylcycloheptane 
D) 4, 4-diethyl-2, 3-dimethylheptane 
E) More than one of the names above is a valid IUPAC name for an alkane. 
A) 1, 4-diethylheptane 
B) 4, 4-diethyl-2, 3, 4-trimethylpentane 
C) 4, 4-diethyl-2, 3, 4-trimethylcycloheptane 
D) 4, 4-diethyl-2, 3-dimethylheptane 
E) More than one of the names above is a valid IUPAC name for an alkane. D

Question 2

Which of the following pairs of compounds are constitutional isomers?

Accepted Answer

A)    
B) (CH3)3CCl and (CH3)3CBr 
C)    
D)    
A)    
B) (CH3)3CCl and (CH3)3CBr 
C)    
D)    A

Question 3

What is the structure of butylcyclopentane?

Accepted Answer

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

Question 4

Which balanced chemical equation represents the incomplete combustion of a hydrocarbon?

Accepted Answer

A) CH3CH2CH3 + 5 O2 $\rightarrow$3 CO2 + 4 H2O 
B) 2 CH3CH2CH3 + 7 O2 $\rightarrow$6 CO + 8 H2O 
C) C36H74 + 36 O2 $\rightarrow$ 36 CO + 37 H2O 
D) C26H50 + 33 O2 $\rightarrow$ 16 CO2 + 10 CO + 25 H2O 
A) CH3CH2CH3 + 5 O2 $\rightarrow$3 CO2 + 4 H2O 
B) 2 CH3CH2CH3 + 7 O2 $\rightarrow$6 CO + 8 H2O 
C) C36H74 + 36 O2 $\rightarrow$ 36 CO + 37 H2O 
D) C26H50 + 33 O2 $\rightarrow$ 16 CO2 + 10 CO + 25 H2O

Question 5

What is the classification of each labeled carbon atom in this structure?

Accepted Answer

A) C1 is a 1°, C2 is 2°, C3 is a 3°, and C4 is 4°. 
B) C1 is a 2°, C2 is 3°, C3 is a 3°, and C4 is 4°. 
C) C1 is a 1°, C2 is 2°, C3 is a 3°, and C4 is 1°. 
D) C1 is a 2°, C2 is 3°, C3 is a 2°, and C4 is 3°. 
A) C1 is a 1°, C2 is 2°, C3 is a 3°, and C4 is 4°. 
B) C1 is a 2°, C2 is 3°, C3 is a 3°, and C4 is 4°. 
C) C1 is a 1°, C2 is 2°, C3 is a 3°, and C4 is 1°. 
D) C1 is a 2°, C2 is 3°, C3 is a 2°, and C4 is 3°.

Question 6

How many polar bonds are in this molecule?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 14 
A) 0 
B) 1 
C) 2 
D) 14

Question 7

How many hydrogen atoms are present in a cyclic alkane with six (6)carbon atoms?

Accepted Answer

A) 6 
B) 8 
C) 10 
D) 12 
E) 14 
A) 6 
B) 8 
C) 10 
D) 12 
E) 14

Question 8

A branched alkane and a cycloalkane with the same number of carbons have the same number of hydrogen atoms in their chemical formulas.

Accepted Answer

A) True 
 B)False

Question 9

Asphalt is a mixture of high molecular weight hydrocarbons. Which solvent would be best for removing asphalt from a newly paved road off the bottom of a pair of shoes?

Accepted Answer

A) water 
B) octane 
C) methanol, CH3OH 
D) NaCl(aq) 
A) water 
B) octane 
C) methanol, CH3OH 
D) NaCl(aq)

Question 10

What is the IUPAC name of this compound?

Accepted Answer

A) 4-propylhexane 
B) 3-ethyl-2-methylhexane 
C) 2-methyl-3-ethylhexane 
D) 4-ethyl-5-methylheptane 
A) 4-propylhexane 
B) 3-ethyl-2-methylhexane 
C) 2-methyl-3-ethylhexane 
D) 4-ethyl-5-methylheptane

Question 11

The IUPAC name of the molecule below is butylcyclopentane.

Accepted Answer

A) True 
 B)False

Question 12

The compound below is an example of a saturated hydrocarbon.

Accepted Answer

A) True 
 B)False

Question 13

The products of the complete combustion of any hydrocarbon are CO2 + H2O, regardless of the identity of the starting material.

Accepted Answer

A) True 
 B)False

Question 14

The compounds below are constitutional isomers.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

What is the structure of butylcyclopentane?

Accepted Answer

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

Question 17

The compound below is an example of a saturated hydrocarbon.

Accepted Answer

A) True 
 B)False

Question 18

The name of the compound below is _____.

Accepted Answer

1, 1-dimet

Question 19

The IUPAC name of the compound below is _____.

Accepted Answer

3, 3-dieth

Question 20

Eicosane has the structure: CH3(CH2)18CH3. What does the prefix eicos specifically indicate about the structure of this compound?

Accepted Answer

A) It contains a straight chain of carbons. 
B) It contains 20 carbons in a continuous chain. 
C) It is an alkane. 
D) It is a saturated hydrocarbon. 
A) It contains a straight chain of carbons. 
B) It contains 20 carbons in a continuous chain. 
C) It is an alkane. 
D) It is a saturated hydrocarbon.

Exam 12: Alkanes

Which name represents a valid IUPAC name for an alkane?

Which of the following pairs of compounds are constitutional isomers?

What is the structure of butylcyclopentane?

Which balanced chemical equation represents the incomplete combustion of a hydrocarbon?

What is the classification of each labeled carbon atom in this structure?

How many polar bonds are in this molecule?

How many hydrogen atoms are present in a cyclic alkane with six (6)carbon atoms?

A branched alkane and a cycloalkane with the same number of carbons have the same number of hydrogen atoms in their chemical formulas.

Asphalt is a mixture of high molecular weight hydrocarbons. Which solvent would be best for removing asphalt from a newly paved road off the bottom of a pair of shoes?

What is the IUPAC name of this compound?

The IUPAC name of the molecule below is butylcyclopentane.

The compound below is an example of a saturated hydrocarbon.

The products of the complete combustion of any hydrocarbon are CO2 + H2O, regardless of the identity of the starting material.

The compounds below are constitutional isomers.

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

What is the structure of butylcyclopentane?

The compound below is an example of a saturated hydrocarbon.

The name of the compound below is _____.

The IUPAC name of the compound below is _____.

Eicosane has the structure: CH3(CH2)18CH3. What does the prefix eicos specifically indicate about the structure of this compound?

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

The products of the complete combustion of any hydrocarbon are CO₂ + H₂O, regardless of the identity of the starting material.

Eicosane has the structure: CH₃(CH₂)₁₈CH₃. What does the prefix eicos specifically indicate about the structure of this compound?