Question 1

Which of the following molecules could be a structural isomer for C5H12?

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 2

The phosphoric acid salt of caffeine has the structure   This molecule behaves as an acid in that it can donate a hydrogen ion, created from the hydrogen atom bonded to the positively charged nitrogen atom. What salt is formed when 1 mole of this salt reacts with 1 mole of sodium hydroxide, NaOH, a strong base?

Accepted Answer

A) Salts can't react to form salts, rather they only arise from the reaction of an acid and a base. 
B)        P  
    
C)    HP     
D)      P     
A) Salts can't react to form salts, rather they only arise from the reaction of an acid and a base. 
B)        P  
    
C)    HP     
D)      P

Question 3

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 4

Organic synthesis is useful ________.

Accepted Answer

A) as an intellectual challenge 
B) for the large-scale production of rare organic molecules 
C) as a confirmation on the chemical structure of molecules isolated from nature 
D) all of the above 
A) as an intellectual challenge 
B) for the large-scale production of rare organic molecules 
C) as a confirmation on the chemical structure of molecules isolated from nature 
D) all of the above

Question 5

Explain why caprylic acid, C   (C     COOH, dissolves in a 5 percent aqueous solution of sodium hydroxide but caprylaldehyde, C   (C     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 6

If you saw the label "phenylephrine HCl" on a decongestant, would you worry that consuming it would expose you to the strong acid hydrochloric acid, HCl?

Accepted Answer

A) No, because it is balanced by the phenylephrine. 
B) No, because the drug is in the solid phase. 
C) No, because this is a salt made using hydrogen chloride, but it is in no way hydrogen chloride. 
D) Yes, because of the hydrochloric acid it contains. 
A) No, because it is balanced by the phenylephrine. 
B) No, because the drug is in the solid phase. 
C) No, because this is a salt made using hydrogen chloride, but it is in no way hydrogen chloride. 
D) Yes, because of the hydrochloric acid it contains.

Question 7

An organic compound is any molecule ________.

Accepted Answer

A) with a structure based upon carbon 
B) grown with organic farming methods 
C) isolated from living organisms, including water 
D) consisting primarily of orgonium atoms 
E) that is a salt obtained from organic creatures 
A) with a structure based upon carbon 
B) grown with organic farming methods 
C) isolated from living organisms, including water 
D) consisting primarily of orgonium atoms 
E) that is a salt obtained from organic creatures

Question 8

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 9

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 10

If an alcoholic beverage is 20 percent alcohol by volume, what is its proof?

Accepted Answer

A) 40 proof 
B) 20 proof 
C) 10 proof 
D) Proof is a measure of flammability. 
E) Proof is a measure of the age of a fermented beverage. 
A) 40 proof 
B) 20 proof 
C) 10 proof 
D) Proof is a measure of flammability. 
E) Proof is a measure of the age of a fermented beverage.

Question 11

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 12

Another name for the "alcohol" of alcoholic beverages is ________.

Accepted Answer

A) ethylene 
B) hydroxyethane 
C) ethyl acetate 
D) gylcerol 
A) ethylene 
B) hydroxyethane 
C) ethyl acetate 
D) gylcerol

Question 13

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.

Question 14

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

Accepted Answer

A) structure (a) 
B) structure (b) 
C) neither structure 
D) both structures 
A) structure (a) 
B) structure (b) 
C) neither structure 
D) both structures

Question 15

What is a hydrocarbon?

Accepted Answer

A) It is a molecule composed of carbon and hydrogen only. 
B) It is a wet carbon atom 
C) It is any organic molecule. 
D) It is a molecule derived from hydrogen synthesis. 
E) none of the above 
A) It is a molecule composed of carbon and hydrogen only. 
B) It is a wet carbon atom 
C) It is any organic molecule. 
D) It is a molecule derived from hydrogen synthesis. 
E) none of the above

Question 16

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

Accepted Answer

A) The polymer cannot be remelted. 
B) Nothing happens. 
C) The polymer does not form. 
D) The polymer has a higher molecular weight. 
E) The polymer is softer and more flexible. 
A) The polymer cannot be remelted. 
B) Nothing happens. 
C) The polymer does not form. 
D) The polymer has a higher molecular weight. 
E) The polymer is softer and more flexible.

Question 17

Hydrocarbons with a carbon-carbon double bond are known as ________.

Accepted Answer

A) alkanes 
B) alkenes 
C) alkynes 
D) aromatics 
A) alkanes 
B) alkenes 
C) alkynes 
D) aromatics

Question 18

Why does replacing the hydroxyl groups on cellulose with nitro groups result in a polymer that is soluble?

Accepted Answer

A) The cellulose can no longer hydrogen bond. 
B) The cellulose becomes more polar. 
C) The cellulose fragments into smaller, more soluble pieces. 
D) The cellulose becomes locked into place by bridging nitro groups. 
E) none of the above 
A) The cellulose can no longer hydrogen bond. 
B) The cellulose becomes more polar. 
C) The cellulose fragments into smaller, more soluble pieces. 
D) The cellulose becomes locked into place by bridging nitro groups. 
E) none of the above

Question 19

Which region (a-b-c)is a hydroxyl 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

Question 20

What would the formula be for the following stick model?

Accepted Answer

A) C6H12 
B) C5H5 
C) C6H10 
D) C5H10 
E) none of the above 
A) C6H12 
B) C5H5 
C) C6H10 
D) C5H10 
E) none of the above

Which of the following molecules could be a structural isomer for C₅H₁₂?

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

Organic synthesis is useful ________.

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

If you saw the label "phenylephrine HCl" on a decongestant, would you worry that consuming it would expose you to the strong acid hydrochloric acid, HCl?

An organic compound is any molecule ________.

What is a functional group?

Which of the following is the simplest possible hydrocarbon?

If an alcoholic beverage is 20 percent alcohol by volume, what is its proof?

How does fractional distillation work?

Another name for the "alcohol" of alcoholic beverages is ________.

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

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

What is a hydrocarbon?

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

Hydrocarbons with a carbon-carbon double bond are known as ________.

Why does replacing the hydroxyl groups on cellulose with nitro groups result in a polymer that is soluble?

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

What would the formula be for the following stick model?

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Exam 12: Organic Compounds

Which of the following molecules could be a structural isomer for C5H12?

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

Organic synthesis is useful ________.

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

If you saw the label "phenylephrine HCl" on a decongestant, would you worry that consuming it would expose you to the strong acid hydrochloric acid, HCl?

An organic compound is any molecule ________.

What is a functional group?

Which of the following is the simplest possible hydrocarbon?

If an alcoholic beverage is 20 percent alcohol by volume, what is its proof?

How does fractional distillation work?

Another name for the "alcohol" of alcoholic beverages is ________.

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

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

What is a hydrocarbon?

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

Hydrocarbons with a carbon-carbon double bond are known as ________.

Why does replacing the hydroxyl groups on cellulose with nitro groups result in a polymer that is soluble?

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

What would the formula be for the following stick model?

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

Which of the following molecules could be a structural isomer for C₅H₁₂?