Question 1

Which of the following ethers has the highest boiling point?

Accepted Answer

A) CH3OCH3 
B) CH3CH2OCH2CH3 
C) CH3CH2CH2OCH2CH2CH3 
D) CH3CH2CH2CH2OCH2CH2CH2CH3 
A) CH3OCH3 
B) CH3CH2OCH2CH3 
C) CH3CH2CH2OCH2CH2CH3 
D) CH3CH2CH2CH2OCH2CH2CH2CH3

Question 2

What property of carbon allows for the formation of so many different organic molecules?

Accepted Answer

A) Carbon forms three different isotopes which allows for the formation of many more molecules than other elements. 
B) Carbon atoms are unique in their ability to form strong chemical bonds repeatedly with other carbon atoms, which permits the formation of countless possible structures. 
C) Carbon atoms uniquely contain exactly the same number (six)of protons, neutrons and electrons in their atomic structure. 
D) Carbon resides in the exact middle of the periodic table, from left to right, with exactly the same number of reactive elements on either side of it. It can therefore react with the maximum number of elements. 
A) Carbon forms three different isotopes which allows for the formation of many more molecules than other elements. 
B) Carbon atoms are unique in their ability to form strong chemical bonds repeatedly with other carbon atoms, which permits the formation of countless possible structures. 
C) Carbon atoms uniquely contain exactly the same number (six)of protons, neutrons and electrons in their atomic structure. 
D) Carbon resides in the exact middle of the periodic table, from left to right, with exactly the same number of reactive elements on either side of it. It can therefore react with the maximum number of elements.

Question 3

The following reaction is used to make the polymer described below. What is the other starting material?

Accepted Answer

A) HOCH2CH2OH 
B) H2O 
C) HOCH2CH3 
D) H2C   CH2 
E) HOCH2CH2CH2CH2OH 
A) HOCH2CH2OH 
B) H2O 
C) HOCH2CH3 
D) H2C   CH2 
E) HOCH2CH2CH2CH2OH

Question 4

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 5

What is one thing that all monomers of addition polymers have in common?

Accepted Answer

A) The monomer has to have at least one double bond. 
B) The monomer has to have at least two functional groups (though they can be the same). 
C) The monomer has to have at least two functional groups (though they must be the different). 
D) The monomer has to be very small. 
E) The monomer has to have a number of polymer components. 
A) The monomer has to have at least one double bond. 
B) The monomer has to have at least two functional groups (though they can be the same). 
C) The monomer has to have at least two functional groups (though they must be the different). 
D) The monomer has to be very small. 
E) The monomer has to have a number of polymer components.

Question 6

Explain why caprylic acid, CH3 (CH2)6COOH, dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde, CH3 (CH2)6CHO, does not.

Accepted Answer

A) With two oxygens the caprylic acid is about twice as polar the caprylaldehyde. 
B) The caprylaldehyde is a gas at room temperature. 
C) The caprylaldehyde behaves as a reducing agent, which neutralizes the sodium hydroxide. 
D) The caprylic acid reacts to form the water soluble salt. 
A) With two oxygens the caprylic acid is about twice as polar the caprylaldehyde. 
B) The caprylaldehyde is a gas at room temperature. 
C) The caprylaldehyde behaves as a reducing agent, which neutralizes the sodium hydroxide. 
D) The caprylic acid reacts to form the water soluble salt.

Question 7

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 8

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 9

Carbon-carbon single bonds can rotate while carbon-carbon double bonds cannot rotate. How many different structures are shown below.

Accepted Answer

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

Question 10

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 11

Which of the following commonly acts as a base in chemical reactions?

Accepted Answer

A) carboxylic acid 
B) alcohol 
C) ketone 
D) amine 
E) hydrocarbon 
A) carboxylic acid 
B) alcohol 
C) ketone 
D) amine 
E) hydrocarbon

Question 12

Which of the following is not a heteroatom?

Accepted Answer

A) O 
B) N 
C) P 
D) A and B 
E) All of the above are heteroatoms. 
A) O 
B) N 
C) P 
D) A and B 
E) All of the above are heteroatoms.

Question 13

Which of the above molecules is a phenol?

Accepted Answer

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

Question 14

Which of the following is not an unsaturated molecule?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) All of the above are unsaturated. 
A) a 
B) b 
C) c 
D) d 
E) All of the above are unsaturated.

Question 15

Which of the following is a saturated molecule?

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 16

How many structural isomers are there for a compound having the molecular formula C3H9N?

Accepted Answer

A) one 
B) two 
C) three 
D) four 
A) one 
B) two 
C) three 
D) four

Question 17

The copolymer styrene-butadiene rubber (SBR), shown below, is used for making tires as well as bubble gum. Is it an addition polymer or a condensation polymer?

Accepted Answer

A) SBR is an addition polymer. 
B) SBR is an condensation polymer. 
C) SBR is neither an addition nor a condensation polymer. 
D) SBR is both an addition and a condensation polymer. 
A) SBR is an addition polymer. 
B) SBR is an condensation polymer. 
C) SBR is neither an addition nor a condensation polymer. 
D) SBR is both an addition and a condensation polymer.

Question 18

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 19

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 20

Which of the following molecules is not a straight-chain hydrocarbon?

Accepted Answer

A) a 
B) b 
C) c 
D) All of the above are straight-chain hydrocarbons. 
E) None of the above are straight-chain hydrocarbons. 
A) a 
B) b 
C) c 
D) All of the above are straight-chain hydrocarbons. 
E) None of the above are straight-chain hydrocarbons.

Exam 19: Organic Compounds

Which of the following ethers has the highest boiling point?

What property of carbon allows for the formation of so many different organic molecules?

The following reaction is used to make the polymer described below. What is the other starting material?

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

What is one thing that all monomers of addition polymers have in common?

Explain why caprylic acid, CH3 (CH2)6COOH, dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde, CH3 (CH2)6CHO, does not.

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

Which of the following is a heteroatom?

Carbon-carbon single bonds can rotate while carbon-carbon double bonds cannot rotate. How many different structures are shown below.

Which of the following commonly acts as a base in chemical reactions?

Which of the following is not a heteroatom?

Which of the above molecules is a phenol?

Which of the following is not an unsaturated molecule?

Which of the following is a saturated molecule?

How many structural isomers are there for a compound having the molecular formula C3H9N?

The copolymer styrene-butadiene rubber (SBR), shown below, is used for making tires as well as bubble gum. Is it an addition polymer or a condensation polymer?

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?

Suggest an explanation for why aspirin has a sour taste.

Which of the following molecules is not a straight-chain hydrocarbon?

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 Timereading 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

Filters

Explain why caprylic acid, CH₃ (CH₂)⁶COOH, dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde, CH₃ (CH₂)⁶CHO, does not.

How many structural isomers are there for a compound having the molecular formula C₃H₉N?