Question 1

Why do ethers have lower boiling points than that of an alcohol of the same molecular weight?

Accepted Answer

A) Ethers cannot hydrogen bond to other ethers. 
B) Ethers do not have hydrogens. 
C) Ethers are more flammable and vaporize more easily. 
D) Ethers have higher boiling points than alcohols. 
E) all of the above 
A) Ethers cannot hydrogen bond to other ethers. 
B) Ethers do not have hydrogens. 
C) Ethers are more flammable and vaporize more easily. 
D) Ethers have higher boiling points than alcohols. 
E) all of the above

Question 2

Which of the following does not describe the number of other atoms a carbon atom can be bonded to?

Accepted Answer

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

Question 3

-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 4

Which of the monomers below would be used to make the following polymer?

Accepted Answer

A) HC   CH-CH3 
B) H2C-CH2-CH3 
C) HC   CH-CH-C   CH-CH3 
D) H2C   CH2 
E) none of the above 
A) HC   CH-CH3 
B) H2C-CH2-CH3 
C) HC   CH-CH-C   CH-CH3 
D) H2C   CH2 
E) none of the above

Question 5

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 6

Which of the following statements best describes the effect of heteroatoms on hydrocarbons?

Accepted Answer

A) Heteroatoms greatly alter the chemical and physical properties of a hydrocarbon. 
B) Heteroatoms have little effect on the chemical and physical properties of a hydrocarbon. 
C) Heteroatoms have very similar properties to hydrocarbons. 
D) The properties of the heteroatom compounds depend only on the atom,not how it is bonded to the hydrocarbon. 
E) none of the above 
A) Heteroatoms greatly alter the chemical and physical properties of a hydrocarbon. 
B) Heteroatoms have little effect on the chemical and physical properties of a hydrocarbon. 
C) Heteroatoms have very similar properties to hydrocarbons. 
D) The properties of the heteroatom compounds depend only on the atom,not how it is bonded to the hydrocarbon. 
E) none of the above

Question 7

Why might a high-formula-mass alcohol be insoluble in water?

Accepted Answer

A) A high formula mass alcohol would be too attracted to itself to be soluble in water. 
B) The bulk of a high formula mass alcohol likely consists of nonpolar hydrocarbons. 
C) Such an alcohol would likely be in a solid phase. 
D) In order for two substance to be soluble in each other their molecules need to be of comparable mass. 
A) A high formula mass alcohol would be too attracted to itself to be soluble in water. 
B) The bulk of a high formula mass alcohol likely consists of nonpolar hydrocarbons. 
C) Such an alcohol would likely be in a solid phase. 
D) In order for two substance to be soluble in each other their molecules need to be of comparable mass.

Question 8

An amine can often form R-NH3+ (where R- can stand for anything)by reacting with water.What is happening?

Accepted Answer

A) The amine is accepting a proton from the water molecule,forming OH-. 
B) Amines are basic. 
C) Amines are acidic. 
D) Amines can form H3O+ in water by donating a proton from the polar portion of the molecule. 
E) none of the above 
A) The amine is accepting a proton from the water molecule,forming OH-. 
B) Amines are basic. 
C) Amines are acidic. 
D) Amines can form H3O+ in water by donating a proton from the polar portion of the molecule. 
E) none of the above

Question 9

Explain why caprylic acid,C $\mathrm { H } _ { 3 }$ (C $\mathrm { H } _ { 2 }$ $)6$ COOH,dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde,C $\mathrm { H } _ { 3 }$ (C $\mathrm { H } _ { 2 }$ $)6$ CHO,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 10

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 11

What is the main difference between High Density PolyEtyhlene (HDPE)and Low Density PolyEthylene(LDPE)?

Accepted Answer

A) HDPE has very long chains packed close together; LDPE has long chains that are branched and do not pack together well. 
B) One is made from high density ethylene,the other from low density ethylene. 
C) HDPE has very long chains packed close together; LDPE has short chains that do not pack together well. 
D) HDPE is more useful than LDPE. 
E) LDPE is more useful than HDPE. 
A) HDPE has very long chains packed close together; LDPE has long chains that are branched and do not pack together well. 
B) One is made from high density ethylene,the other from low density ethylene. 
C) HDPE has very long chains packed close together; LDPE has short chains that do not pack together well. 
D) HDPE is more useful than LDPE. 
E) LDPE is more useful than HDPE.

Question 12

Which of the following molecules would probably be isolated closest to the top of a fractionating tower at a refinery?

Accepted Answer

A) C4H10 
B) C8H18 
C) C10H22 
D) C20H42 
E) C40H82 
A) C4H10 
B) C8H18 
C) C10H22 
D) C20H42 
E) C40H82

Question 13

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 14

What is a functional group?

Accepted Answer

A) a set of atoms bonded together that give molecules containing them similar properties 
B) a group that adds function 
C) a group of hydrocarbons that can be used to make new materials 
D) a set of molecules that are grouped together to form a functional material 
E) none of the above 
A) a set of atoms bonded together that give molecules containing them similar properties 
B) a group that adds function 
C) a group of hydrocarbons that can be used to make new materials 
D) a set of molecules that are grouped together to form a functional material 
E) none of the above

Question 15

What is the chemical formula for the following structure?

Accepted Answer

A)  $\mathrm { C } _ { 6 }$ $\mathrm { H } _ { 10 }$ 
B)  $\mathrm { C } _ { 6 }$ $\mathrm { H_9 }$ 
C)  $\mathrm { C } _ { 7 }$ $\mathrm { H } _ { 12 }$ 
D)  $\mathrm { C } _ { 7 }$ $\mathrm { H } _ { 11 }$ 
A)  $\mathrm { C } _ { 6 }$ $\mathrm { H } _ { 10 }$ 
B)  $\mathrm { C } _ { 6 }$ $\mathrm { H_9 }$ 
C)  $\mathrm { C } _ { 7 }$ $\mathrm { H } _ { 12 }$ 
D)  $\mathrm { C } _ { 7 }$ $\mathrm { H } _ { 11 }$

Question 16

Where would you expect to isolate molecules in a fractionating tower that have a large number of interatomic forces?

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.

Exam 19: Organic Compounds

Why do ethers have lower boiling points than that of an alcohol of the same molecular weight?

Which of the following does not describe the number of other atoms a carbon atom can be bonded to?

-Which of the above molecules is a phenol?

Which of the monomers below would be used to make the following polymer?

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.

Which of the following statements best describes the effect of heteroatoms on hydrocarbons?

Why might a high-formula-mass alcohol be insoluble in water?

An amine can often form R-NH3+ (where R- can stand for anything)by reacting with water.What is happening?

Explain why caprylic acid,C H3\mathrm { H } _ { 3 }H3​ (C H2\mathrm { H } _ { 2 }H2​ )6)6)6 COOH,dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde,C H3\mathrm { H } _ { 3 }H3​ (C H2\mathrm { H } _ { 2 }H2​ )6)6)6 CHO,does not.

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

What is the main difference between High Density PolyEtyhlene (HDPE)and Low Density PolyEthylene(LDPE)?

Which of the following molecules would probably be isolated closest to the top of a fractionating tower at a refinery?

Which of the following is a heteroatom?

What is a functional group?

What is the chemical formula for the following structure?

Where would you expect to isolate molecules in a fractionating tower that have a large number of interatomic forces?

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

Filters

An amine can often form R-NH₃⁺ (where R- can stand for anything)by reacting with water.What is happening?

Explain why caprylic acid,C $\mathrm { H } _ { 3 }$ (C $\mathrm { H } _ { 2 }$ $)6$ COOH,dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde,C $\mathrm { H } _ { 3 }$ (C $\mathrm { H } _ { 2 }$ $)6$ CHO,does not.

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