Question 1

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 2

Which of the following statements describes branched hydrocarbons?

Accepted Answer

A) a hydrocarbon where carbon has a single bond to more than two other carbons 
B) a hydrocarbon where every carbon is bound with a crooked line to every other carbon 
C) a carbon atom that is branched 
D) a hydrocarbon that has a branched shaped conformation 
E) a hydrocarbon that is bound to Br 
A) a hydrocarbon where carbon has a single bond to more than two other carbons 
B) a hydrocarbon where every carbon is bound with a crooked line to every other carbon 
C) a carbon atom that is branched 
D) a hydrocarbon that has a branched shaped conformation 
E) a hydrocarbon that is bound to Br

Question 3

Shown below on the left is the structure of 2-methylpentane. What is the name of the structure on the right, labeled (b)?   (b)

Accepted Answer

A) 2-methylpentane 
B) 3-methylpentane 
C) isopentylmethane 
D) 2-ethylbutane 
A) 2-methylpentane 
B) 3-methylpentane 
C) isopentylmethane 
D) 2-ethylbutane

Question 4

Which of the following polymers has similar properties to Bakelite?

Accepted Answer

A) Plexiglas, poly(methyl methacrylate) 
B) PVC, polyvinyl chloride 
C) Saran (as in Saran Wrap) 
D) Teflon 
E) none of the above 
A) Plexiglas, poly(methyl methacrylate) 
B) PVC, polyvinyl chloride 
C) Saran (as in Saran Wrap) 
D) Teflon 
E) none of the above

Question 5

An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely:

Accepted Answer

A) Structure (a) 
B) Structure (b) 
C) Structure (c) 
D) All three structures are equally possible. 
A) Structure (a) 
B) Structure (b) 
C) Structure (c) 
D) All three structures are equally possible.

Question 6

A single carbon branch within a hydrocarbon is referred to as a methyl group, while a two carbon branch is referred to as an ethyl group. What then is the formal name for the structure shown below?

Accepted Answer

A) 3-methyl-4-ethyl-6-methyloctane 
B) 3,6-dimethyl-4-ethyloctane 
C) 2-ethyl-4-ethyl-5-methylheptane 
D) 2,4-diethyl-5-methylheptane 
A) 3-methyl-4-ethyl-6-methyloctane 
B) 3,6-dimethyl-4-ethyloctane 
C) 2-ethyl-4-ethyl-5-methylheptane 
D) 2,4-diethyl-5-methylheptane

Question 7

Which of the following is a heteroatom?

Accepted Answer

A) O 
B) C 
C) H 
D) A and B 
E) all of the above 
A) O 
B) C 
C) H 
D) A and B 
E) all of the above

Question 8

If champagne has a proof of 28, how many milliliters of alcohol are in 250 mL of champagne?

Accepted Answer

A) 35 
B) 38 
C) 28 
D) 3.8 
E) 200 
A) 35 
B) 38 
C) 28 
D) 3.8 
E) 200

Question 9

Which of the following is the hallmark of a saturated hydrocarbon?

Accepted Answer

A) a hydrocarbon where carbon has only a single bond to two or more other carbons 
B) a hydrocarbon that is completely dissolved in water 
C) a hydrocarbon where carbon has multiple bonds to one or more other carbons 
D) any molecule that is completely dissolved in a hydrocarbon solvent 
E) none of the above 
A) a hydrocarbon where carbon has only a single bond to two or more other carbons 
B) a hydrocarbon that is completely dissolved in water 
C) a hydrocarbon where carbon has multiple bonds to one or more other carbons 
D) any molecule that is completely dissolved in a hydrocarbon solvent 
E) none of the above

Question 10

What is the chemical formula of the following structure?

Accepted Answer

A)  (    O) 
B) (   
    O) 
C)  (    O) 
D)  (    O) 
A)  (    O) 
B) (   
    O) 
C)  (    O) 
D)  (    O)

Question 11

Which of the following molecules contains a phenol?

Accepted Answer

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

Question 12

What property of nitrocellulose has limited its application in modern items?

Accepted Answer

A) It is highly flammable. 
B) It is toxic. 
C) The chemicals used to generate it are extremely expensive. 
D) It is extremely light sensitive and darkens upon exposure to light. 
E) all of the above 
A) It is highly flammable. 
B) It is toxic. 
C) The chemicals used to generate it are extremely expensive. 
D) It is extremely light sensitive and darkens upon exposure to light. 
E) all of the above

Question 13

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 14

Where would you expect to isolate molecules in a fractionating tower that have very few interatomic attractions?

Accepted Answer

A) near the bottom 
B) near the top 
C) near the middle 
D) Fractional distillation takes advantage of molecular weight. 
E) Fractional distillation takes advantage of the number of isomers. 
A) near the bottom 
B) near the top 
C) near the middle 
D) Fractional distillation takes advantage of molecular weight. 
E) Fractional distillation takes advantage of the number of isomers.

Question 15

Which of the following two stick structures are different conformations of the same molecule?

Accepted Answer

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

Question 16

List the following compounds in order of least oxidized to most oxidized

Accepted Answer

A) a < b < c < d 
B) b < a < c < d 
C) c < d < a < b 
D) b < a < d < c 
A) a < b < c < d 
B) b < a < c < d 
C) c < d < a < b 
D) b < a < d < c

Question 17

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

Accepted Answer

A) CH3CH2OH 
B) CH3CH2CH2CH2OH 
C) CH3CH2CH2CH2CH2CH2OH 
D) CH3CH2CH2CH2CH2CH2CH2CH2OH 
E) All of the above are soluble. 
A) CH3CH2OH 
B) CH3CH2CH2CH2OH 
C) CH3CH2CH2CH2CH2CH2OH 
D) CH3CH2CH2CH2CH2CH2CH2CH2OH 
E) All of the above are soluble.

Question 18

Which of the following compounds is an amine?

Accepted Answer

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

Question 19

The solvent diethyl ether can be mixed with water but only by shaking the two liquids together. After the shaking is stopped, the liquids separate into two layers, much like oil and vinegar. The free-base form of the alkaloid caffeine is readily soluble in diethyl ether but not in water. Suggest what might happen to the caffeine of a caffeinated beverage if the beverage was first made alkaline with sodium hydroxide and then shaken with some diethyl ether.

Accepted Answer

A) The water layer would turn a pink color indicating an alkaline pH. 
B) The caffeine would transform into the free base and become more soluble in the diethyl ether. 
C) The caffeine would transform into the free acid and transfer into the diethyl ether. 
D) The diethyl ether and water would mix into one layer. 
A) The water layer would turn a pink color indicating an alkaline pH. 
B) The caffeine would transform into the free base and become more soluble in the diethyl ether. 
C) The caffeine would transform into the free acid and transfer into the diethyl ether. 
D) The diethyl ether and water would mix into one layer.

Question 20

Which region (a-b-c)is an alcohol functional group?

Accepted Answer

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

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

Which of the following statements describes branched hydrocarbons?

Shown below on the left is the structure of 2-methylpentane. What is the name of the structure on the right, labeled (b)? ^(b)

Which of the following polymers has similar properties to Bakelite?

An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely:

A single carbon branch within a hydrocarbon is referred to as a methyl group, while a two carbon branch is referred to as an ethyl group. What then is the formal name for the structure shown below?

Which of the following is a heteroatom?

If champagne has a proof of 28, how many milliliters of alcohol are in 250 mL of champagne?

Which of the following is the hallmark of a saturated hydrocarbon?

What is the chemical formula of the following structure?

Which of the following molecules contains a phenol?

What property of nitrocellulose has limited its application in modern items?

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

Where would you expect to isolate molecules in a fractionating tower that have very few interatomic attractions?

Which of the following two stick structures are different conformations of the same molecule?

List the following compounds in order of least oxidized to most oxidized

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

Which of the following compounds is an amine?

Which region (a-b-c)is an alcohol functional group?

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

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

Which of the following statements describes branched hydrocarbons?

Shown below on the left is the structure of 2-methylpentane. What is the name of the structure on the right, labeled (b)? (b)

Which of the following polymers has similar properties to Bakelite?

An amino acid is an organic molecule that contains both an amine group and a carboxyl group. At an acidic pH, which structure is most likely:

A single carbon branch within a hydrocarbon is referred to as a methyl group, while a two carbon branch is referred to as an ethyl group. What then is the formal name for the structure shown below?

Which of the following is a heteroatom?

If champagne has a proof of 28, how many milliliters of alcohol are in 250 mL of champagne?

Which of the following is the hallmark of a saturated hydrocarbon?

What is the chemical formula of the following structure?

Which of the following molecules contains a phenol?

What property of nitrocellulose has limited its application in modern items?

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

Where would you expect to isolate molecules in a fractionating tower that have very few interatomic attractions?

Which of the following two stick structures are different conformations of the same molecule?

List the following compounds in order of least oxidized to most oxidized

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

Which of the following compounds is an amine?

Which region (a-b-c)is an alcohol functional group?

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

Shown below on the left is the structure of 2-methylpentane. What is the name of the structure on the right, labeled (b)? ^(b)