Question 1

Which of the following molecules can exist as cis-trans isomers?

Accepted Answer

A)  1,1,2-trimethylcyclobutane 
B)  1,3-dimethylcyclobutane 
C)  both 1,1,2-trimethylcyclobutane and 1,3-dimethylcyclobutane 
D)  none of these 
A)  1,1,2-trimethylcyclobutane 
B)  1,3-dimethylcyclobutane 
C)  both 1,1,2-trimethylcyclobutane and 1,3-dimethylcyclobutane 
D)  none of these

Question 2

Why are alkanes called saturated hydrocarbons?

Accepted Answer

A)  because alkanes are used as solvents for most organic compounds 
B)  because alkanes are highly reactive organic compounds 
C)  because alkanes contain only carbon-carbon single bonds 
D)  because alkanes are found in animal fats and plant oils 
A)  because alkanes are used as solvents for most organic compounds 
B)  because alkanes are highly reactive organic compounds 
C)  because alkanes contain only carbon-carbon single bonds 
D)  because alkanes are found in animal fats and plant oils

Question 3

How many different substituent groups can be obtained by removing a hydrogen atom from propane?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 4

What is the IUPAC name of the following compound?

Accepted Answer

A)  cis-1-ethyl-3-methylcyclohexane 
B)  cis-1-methyl-3-ethylcyclohexane 
C)  trans-1-ethyl-3-methylcyclohexane 
D)  trans-1-methyl-3-ethylcyclohexane 
A)  cis-1-ethyl-3-methylcyclohexane 
B)  cis-1-methyl-3-ethylcyclohexane 
C)  trans-1-ethyl-3-methylcyclohexane 
D)  trans-1-methyl-3-ethylcyclohexane

Question 5

Which of the following has the lowest boiling point?

Accepted Answer

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

Question 6

Unbranched hydrocarbons are also called straight-chain hydrocarbons. Which of the following is true of unbranched hydrocarbons?

Accepted Answer

A)  The C-C-C bond angle is 180° in unbranched hydrocarbons. 
B)  Each carbon atom is connected to not more than two other carbon atoms. 
C)  The C-C-C bond angle is 180o in unbranched hydrocarbons and each carbon atom is connected to not more than two other carbon atoms. 
D)  None of these. 
A)  The C-C-C bond angle is 180° in unbranched hydrocarbons. 
B)  Each carbon atom is connected to not more than two other carbon atoms. 
C)  The C-C-C bond angle is 180o in unbranched hydrocarbons and each carbon atom is connected to not more than two other carbon atoms. 
D)  None of these.

Question 7

Which of the following is the molecular formula of nonane?

Accepted Answer

A)  C9H22 
B)  C9H20 
C)  C9H21 
D)  C9H18 
A)  C9H22 
B)  C9H20 
C)  C9H21 
D)  C9H18

Question 8

Which of the following is a correct statement about the conformation given below?

Accepted Answer

A)  The ethyl and methyl groups are in the axial positions. 
B)  All three alkyl substituents are in equatorial positions. 
C)  The ethyl group is in an axial position, whereas the methyl group and propyl groups are in equatorial positions. 
D)  The ethyl and methyl groups are in equatorial positions, whereas the propyl group is in an axial position. 
A)  The ethyl and methyl groups are in the axial positions. 
B)  All three alkyl substituents are in equatorial positions. 
C)  The ethyl group is in an axial position, whereas the methyl group and propyl groups are in equatorial positions. 
D)  The ethyl and methyl groups are in equatorial positions, whereas the propyl group is in an axial position.

Question 9

Which of the following compounds contains only carbon-carbon single bonds?

Accepted Answer

A)  ethane 
B)  ethylene 
C)  benzene 
D)  acetylene 
A)  ethane 
B)  ethylene 
C)  benzene 
D)  acetylene

Question 10

Which of the following is a liquid at room temperature and atmospheric pressure?

Accepted Answer

A)  butane 
B)  ethane 
C)  propane 
D)  none of these 
A)  butane 
B)  ethane 
C)  propane 
D)  none of these

Question 11

Which of the following is the molecular formula of heptane?

Accepted Answer

A)  C7H12 
B)  C7H16 
C)  C7H22 
D)  C7H14 
A)  C7H12 
B)  C7H16 
C)  C7H22 
D)  C7H14

Question 12

Which of the following is a constitutional isomer of hexane?

Accepted Answer

A)    
B)    
C)  both   and
  
D)  none of these 
A)    
B)    
C)  both   and
  
D)  none of these

Question 13

What is the IUPAC name of the given compound?

Accepted Answer

A)  2-ethyl-2-methylpropane 
B)  2,2-dimethylbutane 
C)  3,3-dimethylbutane 
D)  none of these 
A)  2-ethyl-2-methylpropane 
B)  2,2-dimethylbutane 
C)  3,3-dimethylbutane 
D)  none of these

Question 14

What is the IUPAC name of the following compound?

Accepted Answer

A)  cis-1-methyl-3-ethylcyclopentane 
B)  cis-1-ethyl-3-methylcyclopentane 
C)  trans-1-methyl-3-ethylcyclopentane 
D)  trans-1-ethyl-3-methylcyclopentane 
A)  cis-1-methyl-3-ethylcyclopentane 
B)  cis-1-ethyl-3-methylcyclopentane 
C)  trans-1-methyl-3-ethylcyclopentane 
D)  trans-1-ethyl-3-methylcyclopentane

Question 15

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 16

What is the IUPAC name of the given compound?

Accepted Answer

A)  4-ethyl-4-methyloctane 
B)  3-methyl-3-propylheptane 
C)  2-ethyl-2-propylhexane 
D)  none of these 
A)  4-ethyl-4-methyloctane 
B)  3-methyl-3-propylheptane 
C)  2-ethyl-2-propylhexane 
D)  none of these

Question 17

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 18

How many different substituent groups can be obtained by removing a hydrogen atom from butane?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 19

Which of the following is a gas at room temperature and atmospheric pressure?

Accepted Answer

A)  butane 
B)  hexane 
C)  pentane 
D)  none of these 
A)  butane 
B)  hexane 
C)  pentane 
D)  none of these

Question 20

Which isomer of hexane has the highest boiling point?

Accepted Answer

A)  3-methylpentane 
B)  2-methylpentane 
C)  2,2-dimethylbutane 
D)  none of these 
A)  3-methylpentane 
B)  2-methylpentane 
C)  2,2-dimethylbutane 
D)  none of these

Exam 11: Alkanes

Which of the following molecules can exist as cis-trans isomers?

Why are alkanes called saturated hydrocarbons?

How many different substituent groups can be obtained by removing a hydrogen atom from propane?

What is the IUPAC name of the following compound?

Which of the following has the lowest boiling point?

Unbranched hydrocarbons are also called straight-chain hydrocarbons. Which of the following is true of unbranched hydrocarbons?

Which of the following is the molecular formula of nonane?

Which of the following is a correct statement about the conformation given below?

Which of the following compounds contains only carbon-carbon single bonds?

Which of the following is a liquid at room temperature and atmospheric pressure?

Which of the following is the molecular formula of heptane?

Which of the following is a constitutional isomer of hexane?

What is the IUPAC name of the given compound?

What is the IUPAC name of the following compound?

Which of the following has the highest melting point?

What is the IUPAC name of the given compound?

What is the common name of 2-methylbutane?

How many different substituent groups can be obtained by removing a hydrogen atom from butane?

Which of the following is a gas at room temperature and atmospheric pressure?

Which isomer of hexane has the highest boiling point?

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, Alkynes, and Aromatic Compounds

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