Question 1

Which of the following molecules contains a ketone?

Accepted Answer

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

Question 2

How does fractional distillation work?

Accepted Answer

A) It takes advantage of the different boiling points of molecules to separate them. 
B) It takes advantage of the different weight of molecules to separate them. 
C) It uses the fraction of carbon in the isomers to separate the molecules. 
D) It takes advantage of the different melting points to separate molecules. 
E) none of the above 
A) It takes advantage of the different boiling points of molecules to separate them. 
B) It takes advantage of the different weight of molecules to separate them. 
C) It uses the fraction of carbon in the isomers to separate the molecules. 
D) It takes advantage of the different melting points to separate molecules. 
E) none of the above

Question 3

-Which of the above molecules is a ketone?

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 4

Why is 2,4,5-trifluorophenol much more acidic than phenol?

Accepted Answer

A) The fluorines adjacent to the OH group are large and shield the hydroxl group from making the solution basic. 
B) The fluorines de-stabilize the benzene ring and thus give the structure more acidic characteristics. 
C) The fluorines have high electronegativities and help to stabilize the negative charges,which makes it even easier for the hydrogen to be lost. 
D) False! 2,4,5-trifluorophenol is actually not more acidic than phenol. 
A) The fluorines adjacent to the OH group are large and shield the hydroxl group from making the solution basic. 
B) The fluorines de-stabilize the benzene ring and thus give the structure more acidic characteristics. 
C) The fluorines have high electronegativities and help to stabilize the negative charges,which makes it even easier for the hydrogen to be lost. 
D) False! 2,4,5-trifluorophenol is actually not more acidic than phenol.

Question 5

Why is a phenol more acidic than a regular alcohol?

Accepted Answer

A) Phenols have the ability to spread the negative charge that forms. 
B) Phenols have the ability to readily accept the positive charge of the proton. 
C) The negative charge is very concentrated on the oxygen ring of the phenol. 
D) The phenol has more negative charge and therefore is more stable. 
E) Phenols are not more acidic than a regular alcohol. 
A) Phenols have the ability to spread the negative charge that forms. 
B) Phenols have the ability to readily accept the positive charge of the proton. 
C) The negative charge is very concentrated on the oxygen ring of the phenol. 
D) The phenol has more negative charge and therefore is more stable. 
E) Phenols are not more acidic than a regular alcohol.

Question 6

Alkaloid salts are not very soluble in the organic solvent diethyl ether.What might happen to the free-base form of caffeine dissolved in diethyl ether if gaseous hydrogen chloride,HCl,were bubbled into the solution?

Accepted Answer

A) A second layer of water would form. 
B) Nothing,and the HCl gas would merely bubble out of solution. 
C) The diethyl ether insoluble caffeine salt would form as a white precipitate. 
D) The acid/base reaction would release heat,which would cause the diethyl ether to start evaporating. 
A) A second layer of water would form. 
B) Nothing,and the HCl gas would merely bubble out of solution. 
C) The diethyl ether insoluble caffeine salt would form as a white precipitate. 
D) The acid/base reaction would release heat,which would cause the diethyl ether to start evaporating.

Question 7

The compound 6-aminohexanoic acid is used to make the condensation polymer nylon-6.Polymerization is not always successful,however,because of a competing side reaction.What is this side reaction?

Accepted Answer

A) One 6-aminohexanoic acid reacts with another and this reaction is favored in dilute solutions. 
B) One 6-aminohexanoic acid reacts with another and this reaction is favored in concentrated solutions. 
C) One end of the 6-aminohexanoic acid reacts with the other and this reaction is favored in dilute solutions. 
D) One end of the 6-aminohexanoic acid reacts with the other and this reaction is favored in concentrated solutions. 
A) One 6-aminohexanoic acid reacts with another and this reaction is favored in dilute solutions. 
B) One 6-aminohexanoic acid reacts with another and this reaction is favored in concentrated solutions. 
C) One end of the 6-aminohexanoic acid reacts with the other and this reaction is favored in dilute solutions. 
D) One end of the 6-aminohexanoic acid reacts with the other and this reaction is favored in concentrated solutions.

Question 8

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 9

Hydrocarbons release a lot of energy when ignited.Where does this energy ultimately come from?

Accepted Answer

A) the breaking of chemical bonds 
B) the formation of chemical bonds 
C) photosynthesis 
D) nuclear fusion in the sun 
A) the breaking of chemical bonds 
B) the formation of chemical bonds 
C) photosynthesis 
D) nuclear fusion in the sun

Question 10

Heteroatoms make a difference in the physical and chemical properties of an organic molecule because

Accepted Answer

A) they add extra mass to the hydrocarbon structure. 
B) each heteroatom has its own characteristic chemistry. 
C) they can enhance the polarity of the organic molecule. 
D) all of the above 
A) they add extra mass to the hydrocarbon structure. 
B) each heteroatom has its own characteristic chemistry. 
C) they can enhance the polarity of the organic molecule. 
D) all of the above

Question 11

What would the formula be for the following stick model?

Accepted Answer

A) C4H10 
B) C3H3 
C) C3H6 
D) C3H8 
E) C4H8 
A) C4H10 
B) C3H3 
C) C3H6 
D) C3H8 
E) C4H8

Question 12

Why does the melting point of hydrocarbons increase as the number of carbon atoms per molecule increases?

Accepted Answer

A) An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon. 
B) because of greater induced dipole-induced dipole molecular attractions 
C) Larger hydrocarbon chains tend to be branched. 
D) The molecular mass also increases. 
A) An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon. 
B) because of greater induced dipole-induced dipole molecular attractions 
C) Larger hydrocarbon chains tend to be branched. 
D) The molecular mass also increases.

Question 13

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 14

-Which of the above sections of this molecule would be considered an unsaturated 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 15

If an alcoholic beverage has a proof of 151,what is the percentage of alcohol in the beverage?

Accepted Answer

A) 75.5 percent 
B) 151 percent 
C) 15.1 percent 
D) Proof is a measure of flammability. 
E) Proof is a measure of the age of a fermented beverage. 
A) 75.5 percent 
B) 151 percent 
C) 15.1 percent 
D) Proof is a measure of flammability. 
E) Proof is a measure of the age of a fermented beverage.

Question 16

Which of the following compounds is likely to have the best water solubility?

Accepted Answer

A) CH3CH2OH 
B) CH3CH2CH2CH2OH 
C) CH3CH2CH2CH2CH2CH2OH 
D) CH3CH2CH2CH2CH2CH2CH2CH2OH 
A) CH3CH2OH 
B) CH3CH2CH2CH2OH 
C) CH3CH2CH2CH2CH2CH2OH 
D) CH3CH2CH2CH2CH2CH2CH2CH2OH

Question 17

Which of the following is the simplest possible hydrocarbon?

Accepted Answer

A) CH4 
B) H2 
C) HC   CH 
D) H2C   CH2 
E) C2H6 
A) CH4 
B) H2 
C) HC   CH 
D) H2C   CH2 
E) C2H6

Question 18

What happens when you use a monomer with more than two functional groups?

Accepted Answer

A) The polymer cannot be remelted. 
B) The polymer does not form. 
C) The polymer has a lower molecular weight. 
D) The polymer is softer and more flexible. 
A) The polymer cannot be remelted. 
B) The polymer does not form. 
C) The polymer has a lower molecular weight. 
D) The polymer is softer and more flexible.

Question 19

How are monomers and polymers related?

Accepted Answer

A) A monomer is a small,repeating unit that makes up a polymer. 
B) A monomer is one strand of a polymer. 
C) A monomer is made when you condense a polymer through polymerization. 
D) A polymer is chemically identical to a monomer,only larger. 
E) none of the above 
A) A monomer is a small,repeating unit that makes up a polymer. 
B) A monomer is one strand of a polymer. 
C) A monomer is made when you condense a polymer through polymerization. 
D) A polymer is chemically identical to a monomer,only larger. 
E) none of the above

Question 20

Would you expect polypropylene to be denser or less dense than low-density polyethylene? Why?

Accepted Answer

A) Polypropylene should be more dense because because it has a greater molecular mass. 
B) Polyproylene should be more dense because its molecules are able to pack more closely together. 
C) Polyproylene should be less dense because its molecules are not able to pack together as tightly. 
D) Polypropylene should be more dense given that the polyethylene is already known to be of low density. 
A) Polypropylene should be more dense because because it has a greater molecular mass. 
B) Polyproylene should be more dense because its molecules are able to pack more closely together. 
C) Polyproylene should be less dense because its molecules are not able to pack together as tightly. 
D) Polypropylene should be more dense given that the polyethylene is already known to be of low density.

Exam 19: Organic Compounds

Which of the following molecules contains a ketone?

How does fractional distillation work?

-Which of the above molecules is a ketone?

Why is 2,4,5-trifluorophenol much more acidic than phenol?

Why is a phenol more acidic than a regular alcohol?

Alkaloid salts are not very soluble in the organic solvent diethyl ether.What might happen to the free-base form of caffeine dissolved in diethyl ether if gaseous hydrogen chloride,HCl,were bubbled into the solution?

The compound 6-aminohexanoic acid is used to make the condensation polymer nylon-6.Polymerization is not always successful,however,because of a competing side reaction.What is this side reaction?

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

Hydrocarbons release a lot of energy when ignited.Where does this energy ultimately come from?

Heteroatoms make a difference in the physical and chemical properties of an organic molecule because

What would the formula be for the following stick model?

Why does the melting point of hydrocarbons increase as the number of carbon atoms per molecule increases?

Suggest an explanation for why aspirin has a sour taste.

-Which of the above sections of this molecule would be considered an unsaturated portion of the molecule?

If an alcoholic beverage has a proof of 151,what is the percentage of alcohol in the beverage?

Which of the following compounds is likely to have the best water solubility?

Which of the following is the simplest possible hydrocarbon?

What happens when you use a monomer with more than two functional groups?

How are monomers and polymers related?

Would you expect polypropylene to be denser or less dense than low-density polyethylene? Why?

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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