Question 1

Compounds which contain one or more benzene-like rings are classified as which of the following?

Accepted Answer

A)  alkanes 
B)  alkenes 
C)  alkynes 
D)  arenes 
A)  alkanes 
B)  alkenes 
C)  alkynes 
D)  arenes

Question 2

What is the typical size of the hydrocarbons found in lubricating oil?

Accepted Answer

A)  C5 to C12 
B)  C12 to C16 
C)  C15 to C18 
D)  C16 to C20 
A)  C5 to C12 
B)  C12 to C16 
C)  C15 to C18 
D)  C16 to C20

Question 3

Compounds found in which of the following products are removed from closest to the top of the fractional distillation tower used in the refining of petroleum?

Accepted Answer

A)  asphalt 
B)  lubricating oil 
C)  fuel oil 
D)  gasoline 
A)  asphalt 
B)  lubricating oil 
C)  fuel oil 
D)  gasoline

Question 4

Which of the following straight chain alkanes has a density greater than that of water?

Accepted Answer

A)  C6H14 
B)  C20H42 
C)  C40H82 
D)  none of them 
A)  C6H14 
B)  C20H42 
C)  C40H82 
D)  none of them

Question 5

How many cycloalkanes have the molecular formula C5H10?

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
A)  3 
B)  4 
C)  5 
D)  6

Question 6

Which of the following is true of heptane and 2,2,3-trimethylbutane?

Accepted Answer

A)  They have the same melting point 
B)  They have the same boiling point. 
C)  Both a and b are true. 
D)  Neither a nor b is true. 
A)  They have the same melting point 
B)  They have the same boiling point. 
C)  Both a and b are true. 
D)  Neither a nor b is true.

Question 7

The butyl group is obtained by doing which of the following?

Accepted Answer

A)  removing a hydrogen atom from C-1 of butane 
B)  removing a hydrogen atom from C-2 of butane 
C)  removing a hydrogen atom from C-1 of 2-methylpropane 
D)  removing a hydrogen atom from C-2 of 2-methylpropane 
A)  removing a hydrogen atom from C-1 of butane 
B)  removing a hydrogen atom from C-2 of butane 
C)  removing a hydrogen atom from C-1 of 2-methylpropane 
D)  removing a hydrogen atom from C-2 of 2-methylpropane

Question 8

When naming a branching substituent in an alkane, which of the following is the correct procedure?

Accepted Answer

A)  Add the suffix -yl to the name of the parent hydrocarbon. 
B)  Replace the suffix -ane with the suffix -yl. 
C)  Replace the suffix -ane with the suffix -anyl. 
D)  Insert -yl before the suffix -ane. 
A)  Add the suffix -yl to the name of the parent hydrocarbon. 
B)  Replace the suffix -ane with the suffix -yl. 
C)  Replace the suffix -ane with the suffix -anyl. 
D)  Insert -yl before the suffix -ane.

Question 9

What is the IUPAC name of the following compound?

Accepted Answer

A)  1,1-dipropylcyclohexane 
B)  1-isopropyl-1-propylcyclohexane 
C)  isopropylpropylcyclohexane 
D)  none of these 
A)  1,1-dipropylcyclohexane 
B)  1-isopropyl-1-propylcyclohexane 
C)  isopropylpropylcyclohexane 
D)  none of these

Question 10

What is the common name of 2-methylbutane?

Accepted Answer

A)  isopentane 
B)  neopentane 
C)  2-methylisopropane 
D)  none of these 
A)  isopentane 
B)  neopentane 
C)  2-methylisopropane 
D)  none of these

Question 11

Which of the following has the highest melting point?

Accepted Answer

A)  decane 
B)  hexane 
C)  octane 
D)  nonane 
A)  decane 
B)  hexane 
C)  octane 
D)  nonane

Question 12

Consider the following ball and stick model.   Which of the following represents a constitutional isomer of this compound?

Accepted Answer

A)  methylpropane 
B)  CH3CH2CH2CH2CH3 
C)    
D)  None represent constitutional isomers. 
A)  methylpropane 
B)  CH3CH2CH2CH2CH3 
C)    
D)  None represent constitutional isomers.

Question 13

Which of the following are representations of the same molecule? (i)
CH3CH2CH2CH2CH2CH2CH3(ii)   (iii)

Accepted Answer

A)  only (i) and (ii) 
B)  only (i) and (iii) 
C)  only (ii) and (iii) 
D)  none of them 
A)  only (i) and (ii) 
B)  only (i) and (iii) 
C)  only (ii) and (iii) 
D)  none of them

Question 14

Pentane and 2-methylbutane have third isomer, neopentane. What is the IUPAC name of this isomer?

Accepted Answer

A)  2,2-dimethylpropane 
B)  2-methylisobutane 
C)  2-ethylpropane 
D)  none of these 
A)  2,2-dimethylpropane 
B)  2-methylisobutane 
C)  2-ethylpropane 
D)  none of these

Question 15

What is the IUPAC name of the compound below?

Accepted Answer

A)  2-isopropyl-2,3-dimethylpentane 
B)  2-sec-butyl-2-isopropylpropane 
C)  2,3,3,4-tetramethylhexane 
D)  none of these 
A)  2-isopropyl-2,3-dimethylpentane 
B)  2-sec-butyl-2-isopropylpropane 
C)  2,3,3,4-tetramethylhexane 
D)  none of these

Question 16

Which of the following is the correct line-angle structure for 3-ethylheptane?

Accepted Answer

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

Question 17

Consider the following ball and stick model.   Which of the following is another way of showing this same structure?

Accepted Answer

A)  C5H10 
B)  CH3CH2CH2CH2CH3 
C)    
D)  All are equivalent representations. 
A)  C5H10 
B)  CH3CH2CH2CH2CH3 
C)    
D)  All are equivalent representations.

Question 18

Which of the following reactions will consume the most oxygen?

Accepted Answer

A)  complete combustion of one mole of butane 
B)  complete combustion of one mole of pentane 
C)  complete combustion of one mole of propane 
D)  complete combustion of one mole of hexane 
A)  complete combustion of one mole of butane 
B)  complete combustion of one mole of pentane 
C)  complete combustion of one mole of propane 
D)  complete combustion of one mole of hexane

Question 19

The formula of a particular compound can be written as (i)
C4H10(ii)
CH3CH2CH2CH3(iii)
CH3(CH2)2CH3Which of the following is true?

Accepted Answer

A)  All of these provide exactly the same amount of information. 
B)  Formula (ii) provides more information than formulas (i) or (iii). 
C)  Formulas (ii) and (iii) provide exactly the same amount of information. 
D)  No two of these provide exactly the same amount of information. 
A)  All of these provide exactly the same amount of information. 
B)  Formula (ii) provides more information than formulas (i) or (iii). 
C)  Formulas (ii) and (iii) provide exactly the same amount of information. 
D)  No two of these provide exactly the same amount of information.

Question 20

Which of the following is a correct IUPAC name?

Accepted Answer

A)  2-ethyl-3-methylpentane 
B)  2,2-dimethylpentane 
C)  2,2-diethylpentane 
D)  all of them 
A)  2-ethyl-3-methylpentane 
B)  2,2-dimethylpentane 
C)  2,2-diethylpentane 
D)  all of them

Exam 11: Alkanes

Compounds which contain one or more benzene-like rings are classified as which of the following?

What is the typical size of the hydrocarbons found in lubricating oil?

Compounds found in which of the following products are removed from closest to the top of the fractional distillation tower used in the refining of petroleum?

Which of the following straight chain alkanes has a density greater than that of water?

How many cycloalkanes have the molecular formula C5H10?

Which of the following is true of heptane and 2,2,3-trimethylbutane?

The butyl group is obtained by doing which of the following?

When naming a branching substituent in an alkane, which of the following is the correct procedure?

What is the IUPAC name of the following compound?

What is the common name of 2-methylbutane?

Which of the following has the highest melting point?

Consider the following ball and stick model. Which of the following represents a constitutional isomer of this compound?

Which of the following are representations of the same molecule? (i) CH3CH2CH2CH2CH2CH2CH3(ii) (iii)

Pentane and 2-methylbutane have third isomer, neopentane. What is the IUPAC name of this isomer?

What is the IUPAC name of the compound below?

Which of the following is the correct line-angle structure for 3-ethylheptane?

Consider the following ball and stick model. Which of the following is another way of showing this same structure?

Which of the following reactions will consume the most oxygen?

The formula of a particular compound can be written as (i) C4H10(ii) CH3CH2CH2CH3(iii) CH3(CH2)2CH3Which of the following is true?

Which of the following is a correct IUPAC name?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkenes and Alkynes

Benzene and Its Derivatives

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

How many cycloalkanes have the molecular formula C₅H₁₀?

Which of the following are representations of the same molecule? (i) CH₃CH₂CH₂CH₂CH₂CH₂CH₃(ii) (iii)

The formula of a particular compound can be written as (i) C₄H₁₀(ii) CH₃CH₂CH₂CH₃(iii) CH₃(CH₂)₂CH₃Which of the following is true?