Question 1

Which of the above molecules would most likely have a strong, distinct smell?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) a or d 
A) a 
B) b 
C) c 
D) d 
E) a or d

Question 2

An organic chemist's retrosynthesis analysis focuses on how ________.

Accepted Answer

A) to create large organic molecules from smaller organic molecules 
B) to produce a desired organic molecule using only environmentally friendly chemical reactions 
C) a large organic molecule can be broken down into smaller organic molecules 
D) small organic molecules can be joined together by improving upon outdated chemical reactions 
A) to create large organic molecules from smaller organic molecules 
B) to produce a desired organic molecule using only environmentally friendly chemical reactions 
C) a large organic molecule can be broken down into smaller organic molecules 
D) small organic molecules can be joined together by improving upon outdated chemical reactions

Question 3

Which of the following molecules could be a different conformation of the underlined molecule below?

Accepted Answer

A) a 
B) b 
C) c 
D) all of the above 
E) none of the above 
A) a 
B) b 
C) c 
D) all of the above 
E) none of the above

Question 4

What is the chemical cause of engine knock?

Accepted Answer

A) the straight chain isomers igniting too early in the engine 
B) the branched isomers igniting too early in the engine 
C) the wrong conformer igniting too early in the engine 
D) too much oxygen in your piston 
E) the octane igniting too early in your engine 
A) the straight chain isomers igniting too early in the engine 
B) the branched isomers igniting too early in the engine 
C) the wrong conformer igniting too early in the engine 
D) too much oxygen in your piston 
E) the octane igniting too early in your engine

Question 5

Which of the above structures should be named as a hexane?

Accepted Answer

A) a 
B) b 
C) c 
D) None of the above 
A) a 
B) b 
C) c 
D) None of the above

Question 6

The temperatures in a fractionating tower at an oil refinery are important, but so are the pressures. Where might the pressure in a fractional distillation tower be greatest, at the bottom or at the top? Defend your answer.

Accepted Answer

A) The pressure is greatest at the bottom because the higher temperature means a greater number of vaporized molecules. 
B) The pressure is greatest at the top because the higher temperature means a greater number of vaporized molecules. 
C) The pressure is greatest at the bottom because the lower temperature means a greater number of vaporized molecules. 
D) The pressure is greatest at the top because the lower temperature means a greater number of vaporized molecules. 
A) The pressure is greatest at the bottom because the higher temperature means a greater number of vaporized molecules. 
B) The pressure is greatest at the top because the higher temperature means a greater number of vaporized molecules. 
C) The pressure is greatest at the bottom because the lower temperature means a greater number of vaporized molecules. 
D) The pressure is greatest at the top because the lower temperature means a greater number of vaporized molecules.

Question 7

One of the skin-irritating components of poison oak is tetrahydrourushiol:   The long, nonpolar hydrocarbon tail embeds itself in a person's oily skin, where the molecule initiates an allergic response. Scratching the itch spreads tetrahydrourushiol molecules over a greater surface area, causing the zone of irritation to grow. Is this compound an alcohol or a phenol?

Accepted Answer

A) an alcohol because of the hydroxyl groups it contains 
B) both a phenol and an alcohol because of the hydroxyl groups it contains 
C) a phenol because of the hydroxyl groups attached to the benzene ring 
D) neither an alcohol or phenol because it contains two hydroxyl groups instead of one 
A) an alcohol because of the hydroxyl groups it contains 
B) both a phenol and an alcohol because of the hydroxyl groups it contains 
C) a phenol because of the hydroxyl groups attached to the benzene ring 
D) neither an alcohol or phenol because it contains two hydroxyl groups instead of one

Question 8

Suggest an explanation for why aspirin has a sour taste.

Accepted Answer

A) It is the acidic nature of aspirin that gives rise to its sour taste. 
B) The sour flavor is added to help prevent overdosing. 
C) Aspirin is made sour as a mandated child safety feature. 
D) It is the basic nature of aspirin that gives rise to its sour taste. 
A) It is the acidic nature of aspirin that gives rise to its sour taste. 
B) The sour flavor is added to help prevent overdosing. 
C) Aspirin is made sour as a mandated child safety feature. 
D) It is the basic nature of aspirin that gives rise to its sour taste.

Question 9

How many different isomers of 3-methyl-2-pentene are there?

Accepted Answer

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

Question 10

Why is rubber heated with sulfur more elastic than natural rubber?

Accepted Answer

A) The polymer molecules do not rearrange because they are locked in place. 
B) The polymer molecules change shape and look more like a spring. 
C) The sulfur breaks the polymer chains into shorter structures. 
D) The sulfur solidifies inside the rubber so the molecules cannot move past the sulfur domains. 
E) all of the above 
A) The polymer molecules do not rearrange because they are locked in place. 
B) The polymer molecules change shape and look more like a spring. 
C) The sulfur breaks the polymer chains into shorter structures. 
D) The sulfur solidifies inside the rubber so the molecules cannot move past the sulfur domains. 
E) all of the above

Question 11

If you were throwing a party, which of these compounds would probably be on the beverage list?

Accepted Answer

A) CH3CH2OH 
B) CH3CH2CH3 
C) CH3OH 
D) CH3CH   CH2 
E) Milk, it does the body good. 
A) CH3CH2OH 
B) CH3CH2CH3 
C) CH3OH 
D) CH3CH   CH2 
E) Milk, it does the body good.

Question 12

Which of the above molecules is an aldehyde?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) none of the above 
A) a 
B) b 
C) c 
D) d 
E) none of the above

Question 13

What is the chemical formula for the following structure?

Accepted Answer

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

Question 14

What is the percent volume of water in 80-proof vodka?

Accepted Answer

A) 80 percent 
B) 60 percent 
C) 40 percent 
D) 20 percent 
A) 80 percent 
B) 60 percent 
C) 40 percent 
D) 20 percent

Question 15

Which of the following statements best describes the concept of structural conformation?

Accepted Answer

A) rearranging the shape of a molecule by rotating around bonds 
B) rearranging the shape of a molecule by changing the arrangement of bonds 
C) changing the structure by adding or subtracting bonds 
D) arranging the atom into the best conformation for the given structure 
E) changing the conformation to generate a new molecule with different chemical properties 
A) rearranging the shape of a molecule by rotating around bonds 
B) rearranging the shape of a molecule by changing the arrangement of bonds 
C) changing the structure by adding or subtracting bonds 
D) arranging the atom into the best conformation for the given structure 
E) changing the conformation to generate a new molecule with different chemical properties

Question 16

Which of the following is an aromatic molecule?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) all of the above 
A) a 
B) b 
C) c 
D) d 
E) all of the above

Question 17

What determines the chemical and physical properties of hydrocarbons?

Accepted Answer

A) the way the atoms are connected together 
B) the number of carbon and hydrogens 
C) the elements it is composed of 
D) the number of oxygen 
E) both A and B 
A) the way the atoms are connected together 
B) the number of carbon and hydrogens 
C) the elements it is composed of 
D) the number of oxygen 
E) both A and B

Question 18

Formaldehyde is a toxic preservative with the following chemical formula: H2C   O Which of the following compounds would best serve as a starting point for its production?

Accepted Answer

A) H3COH 
B) H2C   CH2 
C) H2O 
D) CH3CH2OH 
E) none of the above 
A) H3COH 
B) H2C   CH2 
C) H2O 
D) CH3CH2OH 
E) none of the above

Question 19

Which of the above sections of this molecule would be considered to be the aromatic portion of the molecule?

Accepted Answer

A) a 
B) b 
C) c 
D) a and b 
E) all of the above 
A) a 
B) b 
C) c 
D) a and b 
E) all of the above

Question 20

Which of the following molecules is a branched hydrocarbon?

Accepted Answer

A) a 
B) b 
C) c 
D) All of the above are branched hydrocarbons. 
E) only a and b 
A) a 
B) b 
C) c 
D) All of the above are branched hydrocarbons. 
E) only a and b

Which of the above molecules would most likely have a strong, distinct smell?

An organic chemist's retrosynthesis analysis focuses on how ________.

Which of the following molecules could be a different conformation of the underlined molecule below?

What is the chemical cause of engine knock?

Which of the above structures should be named as a hexane?

The temperatures in a fractionating tower at an oil refinery are important, but so are the pressures. Where might the pressure in a fractional distillation tower be greatest, at the bottom or at the top? Defend your answer.

Suggest an explanation for why aspirin has a sour taste.

How many different isomers of 3-methyl-2-pentene are there?

Why is rubber heated with sulfur more elastic than natural rubber?

If you were throwing a party, which of these compounds would probably be on the beverage list?

Which of the above molecules is an aldehyde?

What is the chemical formula for the following structure?

What is the percent volume of water in 80-proof vodka?

Which of the following statements best describes the concept of structural conformation?

Which of the following is an aromatic molecule?

What determines the chemical and physical properties of hydrocarbons?

Formaldehyde is a toxic preservative with the following chemical formula: H₂C O Which of the following compounds would best serve as a starting point for its production?

Which of the above sections of this molecule would be considered to be the aromatic portion of the molecule?

Which of the following molecules is a branched hydrocarbon?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

Exam 12: Organic Compounds

Which of the above molecules would most likely have a strong, distinct smell?

An organic chemist's retrosynthesis analysis focuses on how ________.

Which of the following molecules could be a different conformation of the underlined molecule below?

What is the chemical cause of engine knock?

Which of the above structures should be named as a hexane?

The temperatures in a fractionating tower at an oil refinery are important, but so are the pressures. Where might the pressure in a fractional distillation tower be greatest, at the bottom or at the top? Defend your answer.

Suggest an explanation for why aspirin has a sour taste.

How many different isomers of 3-methyl-2-pentene are there?

Why is rubber heated with sulfur more elastic than natural rubber?

If you were throwing a party, which of these compounds would probably be on the beverage list?

Which of the above molecules is an aldehyde?

What is the chemical formula for the following structure?

What is the percent volume of water in 80-proof vodka?

Which of the following statements best describes the concept of structural conformation?

Which of the following is an aromatic molecule?

What determines the chemical and physical properties of hydrocarbons?

Formaldehyde is a toxic preservative with the following chemical formula: H2C O Which of the following compounds would best serve as a starting point for its production?

Which of the above sections of this molecule would be considered to be the aromatic portion of the molecule?

Which of the following molecules is a branched hydrocarbon?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

Formaldehyde is a toxic preservative with the following chemical formula: H₂C O Which of the following compounds would best serve as a starting point for its production?