Question 1

Which pair(s) of molecules below are neither isomers nor conformers?

Accepted Answer

A)  Pair 1 
B)  Pair 2 
C)  Pair 3 
D)  Pair 4 
E)  These are all either isomers or conformers. 
A)  Pair 1 
B)  Pair 2 
C)  Pair 3 
D)  Pair 4 
E)  These are all either isomers or conformers.

Question 2

Which of the following structures is a branched-chain hydrocarbon?

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  II and III 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  II and III

Question 3

Which of the following compounds is a saturated hydrocarbon?

Accepted Answer

A)  I only 
B)  I and II 
C)  IV only 
D)  III and IV 
E)  All of these are saturated hydrocarbons. 
A)  I only 
B)  I and II 
C)  IV only 
D)  III and IV 
E)  All of these are saturated hydrocarbons.

Question 4

Which of the following statements describes why "good fats" are considered good and "bad fats" are considered bad? 
I. A diet high in saturated fat can result in heart disease.
II. A diet high in unsaturated fat can result in type 2 diabetes.
III. A diet high is trans fats can result in a decreased risk of cancer.
IV. A diet high in unsaturated fats can result in a decreased risk of cancer

Accepted Answer

A)  All of these statements are true. 
B)  I and II are true. 
C)  I, III, and IV are true. 
D)  I and IV are true. 
E)  II and III are true. 
A)  All of these statements are true. 
B)  I and II are true. 
C)  I, III, and IV are true. 
D)  I and IV are true. 
E)  II and III are true.

Question 5

Which of the following molecules contains a conjugated polyene?

Accepted Answer

A)   
B)   
C)   
D)   
E)  All of these contain a conjugated polyene 
A)   
B)   
C)   
D)   
E)  All of these contain a conjugated polyene

Question 6

For naming purposes, which carbon is the double bond located in this branched-chain hydrocarbon?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 7

Which of the following definitions best describes structural isomers?

Accepted Answer

A)  They are molecules with different structures. 
B)  They are molecules with the same molecular formula and the same structure. 
C)  They are molecules with the same physical properties. 
D)  They are molecules that have the same molecular formula but different structures. 
E)  They are molecules that look similar. 
A)  They are molecules with different structures. 
B)  They are molecules with the same molecular formula and the same structure. 
C)  They are molecules with the same physical properties. 
D)  They are molecules that have the same molecular formula but different structures. 
E)  They are molecules that look similar.

Question 8

Which of the following compounds is a valid Lewis structure of a hydrocarbon?

Accepted Answer

A)  All of these compounds are valid structures of hydrocarbons. 
B)  I, II, and IV are valid structures of hydrocarbons. 
C)  III and IV are valid structures of hydrocarbons. 
D)  Only III is a valid structure of hydrocarbons. 
E)  Only IV is a valid structure of hydrocarbons. 
A)  All of these compounds are valid structures of hydrocarbons. 
B)  I, II, and IV are valid structures of hydrocarbons. 
C)  III and IV are valid structures of hydrocarbons. 
D)  Only III is a valid structure of hydrocarbons. 
E)  Only IV is a valid structure of hydrocarbons.

Question 9

Converting a cis isomer to a trans isomer

Accepted Answer

A)  requires nothing. Cis and trans isomers are actually just conformers, so they interconvert all of the time. 
B)  requires a chemical reaction. 
C)  requires a physical change such as melting or boiling. 
D)  requires both a chemical reaction and a physical change. 
E)  is impossible. There is no way to convert a cis isomer to a trans isomer. 
A)  requires nothing. Cis and trans isomers are actually just conformers, so they interconvert all of the time. 
B)  requires a chemical reaction. 
C)  requires a physical change such as melting or boiling. 
D)  requires both a chemical reaction and a physical change. 
E)  is impossible. There is no way to convert a cis isomer to a trans isomer.

Question 10

Which of the following structures represent benzene?

Accepted Answer

A)  II and IV 
B)  I, II, and IV 
C)  III and V 
D)  All of them except V 
E)  All of them 
A)  II and IV 
B)  I, II, and IV 
C)  III and V 
D)  All of them except V 
E)  All of them

Question 11

What happens in the retina as a result of the change illustrated in the reaction of rhodopsin in the presence of light?

Accepted Answer

A)  Nothing happens. 
B)  The retina is damaged. 
C)  A signal is sent to the brain that light is detected. 
D)  A signal is sent to the spinal cord to react to the light. 
E)  The retina makes more protein. 
A)  Nothing happens. 
B)  The retina is damaged. 
C)  A signal is sent to the brain that light is detected. 
D)  A signal is sent to the spinal cord to react to the light. 
E)  The retina makes more protein.

Question 12

Which of the following statements best describes alkanes?

Accepted Answer

A)  They are hydrocarbons. 
B)  They contain only C-C single bonds. 
C)  They take on a regular zig-zag shape. 
D)  They are hydrophobic. 
E)  All of the above 
A)  They are hydrocarbons. 
B)  They contain only C-C single bonds. 
C)  They take on a regular zig-zag shape. 
D)  They are hydrophobic. 
E)  All of the above

Question 13

Below is illustrated a molecule of butane. Which of the given choices is another molecule of butane in a different conformation? Assume that all atoms in each are visible.   Butane

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 14

How many hydrogen atoms are in the following structure?

Accepted Answer

The answer of How many hydrogen atoms are in the...

Question 15

A hydrocarbon contains

Accepted Answer

A)  only carbon, hydrogen, nitrogen and oxygen. 
B)  only carbon and hydrogen. 
C)  only carbon, hydrogen, and oxygen. 
D)  only carbon, hydrogen, and nitrogen. 
E)  any element except carbon and hydrogen. 
A)  only carbon, hydrogen, nitrogen and oxygen. 
B)  only carbon and hydrogen. 
C)  only carbon, hydrogen, and oxygen. 
D)  only carbon, hydrogen, and nitrogen. 
E)  any element except carbon and hydrogen.

Question 16

Which of the following skeletal line structures represent the same molecule?

Accepted Answer

A)  I and II 
B)  II and III 
C)  I, II, IV, and V 
D)  IV and V 
E)  II, IV, and V 
A)  I and II 
B)  II and III 
C)  I, II, IV, and V 
D)  IV and V 
E)  II, IV, and V

Question 17

Which of the following structures is the condensed structural formula of 1-hexene?

Accepted Answer

A)   
B)   
C)   
D)   
E)   
A)   
B)   
C)   
D)   
E)

Question 18

Which of the fatty acids are saturated?

Accepted Answer

A)  All of them are saturated. 
B)  Only B and C are saturated. 
C)  Only A, D, and E are saturated. 
D)  A, D, B, and E are saturated. 
E)  None of them are saturated. 
A)  All of them are saturated. 
B)  Only B and C are saturated. 
C)  Only A, D, and E are saturated. 
D)  A, D, B, and E are saturated. 
E)  None of them are saturated.

Question 19

Which structures are straight chain hydrocarbons?   I II III IV

Accepted Answer

A)  I only 
B)  II and IV 
C)  II, III, and IV 
D)  I and III 
E)  All of these molecules have a straight chain. 
A)  I only 
B)  II and IV 
C)  II, III, and IV 
D)  I and III 
E)  All of these molecules have a straight chain.

Question 20

Which of the following condensed structures best represents the skeletal line structure below?

Accepted Answer

A)   
B)   
C)   
D)   
E)   
A)   
B)   
C)   
D)   
E)

Which pair(s) of molecules below are neither isomers nor conformers?

Which of the following structures is a branched-chain hydrocarbon?

Which of the following compounds is a saturated hydrocarbon?

Which of the following molecules contains a conjugated polyene?

For naming purposes, which carbon is the double bond located in this branched-chain hydrocarbon?

Which of the following definitions best describes structural isomers?

Which of the following compounds is a valid Lewis structure of a hydrocarbon?

Converting a cis isomer to a trans isomer

Which of the following structures represent benzene?

What happens in the retina as a result of the change illustrated in the reaction of rhodopsin in the presence of light?

Which of the following statements best describes alkanes?

Below is illustrated a molecule of butane. Which of the given choices is another molecule of butane in a different conformation? Assume that all atoms in each are visible. Butane

How many hydrogen atoms are in the following structure?

A hydrocarbon contains

Which of the following skeletal line structures represent the same molecule?

Which of the following structures is the condensed structural formula of 1-hexene?

Which of the fatty acids are saturated?

Which structures are straight chain hydrocarbons? I II III IV

Which of the following condensed structures best represents the skeletal line structure below?

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Chemical Quantities and Chemical Reactions

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Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

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The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

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Exam 6: Organic Chemistry: Hydrocarbons

Which pair(s) of molecules below are neither isomers nor conformers?

Which of the following structures is a branched-chain hydrocarbon?

Which of the following compounds is a saturated hydrocarbon?

Which of the following molecules contains a conjugated polyene?

For naming purposes, which carbon is the double bond located in this branched-chain hydrocarbon?

Which of the following definitions best describes structural isomers?

Which of the following compounds is a valid Lewis structure of a hydrocarbon?

Converting a cis isomer to a trans isomer

Which of the following structures represent benzene?

What happens in the retina as a result of the change illustrated in the reaction of rhodopsin in the presence of light?

Which of the following statements best describes alkanes?

Below is illustrated a molecule of butane. Which of the given choices is another molecule of butane in a different conformation? Assume that all atoms in each are visible. Butane

How many hydrogen atoms are in the following structure?

A hydrocarbon contains

Which of the following skeletal line structures represent the same molecule?

Which of the following structures is the condensed structural formula of 1-hexene?

Which of the fatty acids are saturated?

Which structures are straight chain hydrocarbons? I II III IV

Which of the following condensed structures best represents the skeletal line structure below?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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