Question 1

Which of the following elements is NOT a heteroatom?

Accepted Answer

A)  carbon 
B)  sulfur 
C)  nitrogen 
D)  oxygen 
E)  phosphorous 
A)  carbon 
B)  sulfur 
C)  nitrogen 
D)  oxygen 
E)  phosphorous A

Question 2

Which of the following statements about alkanes is NOT true?

Accepted Answer

A)  Alkanes can move and twist. 
B)  Merely rotating a C-C bond does not change the identity of an alkane. 
C)  Alkanes are hydrophilic. 
D)  Alkanes more rapidly twist and rotate at higher temperatures. 
E)  Alkanes are often found in a zig-zag shape. 
A)  Alkanes can move and twist. 
B)  Merely rotating a C-C bond does not change the identity of an alkane. 
C)  Alkanes are hydrophilic. 
D)  Alkanes more rapidly twist and rotate at higher temperatures. 
E)  Alkanes are often found in a zig-zag shape. C

Question 3

Which of the following condensed structures are branched and which are straight chains?

Accepted Answer

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

Question 4

Is the following cycloalkane more or less abundant in nature than cyclohexane?

Accepted Answer

A)  more abundant because it is smaller 
B)  more abundant because it is more stable 
C)  less abundant because it is substituted 
D)  less abundant because the bond angles are not 109.5° 
E)  more abundant because it is substituted 
A)  more abundant because it is smaller 
B)  more abundant because it is more stable 
C)  less abundant because it is substituted 
D)  less abundant because the bond angles are not 109.5° 
E)  more abundant because it is substituted

Question 5

What is the molecular shape around the carbon indicated with an arrow?

Accepted Answer

A)  linear 
B)  trigonal pyramidal 
C)  tetrahedral 
D)  bent 
E)  trigonal planar 
A)  linear 
B)  trigonal pyramidal 
C)  tetrahedral 
D)  bent 
E)  trigonal planar

Question 6

A compound with the molecular formula CnH2n+2 is called a(n)______or a ______.

Accepted Answer

A)  alkane, saturated hydrocarbon 
B)  alkane, unsaturated hydrocarbon 
C)  alkene, saturated hydrocarbon 
D)  alkene, unsaturated hydrocarbon 
E)  alkene, alkyne 
A)  alkane, saturated hydrocarbon 
B)  alkane, unsaturated hydrocarbon 
C)  alkene, saturated hydrocarbon 
D)  alkene, unsaturated hydrocarbon 
E)  alkene, alkyne

Question 7

Which of these fatty acids is considered a "good fat"?

Accepted Answer

A)  None because all fats are bad 
B)  All of them because all fats taste good 
C)  B and E because the higher the molecular weight, the better the fat is 
D)  C and B because these molecules contain cis double bonds 
E)  A, D, and E because these molecules do not contain any double bonds 
A)  None because all fats are bad 
B)  All of them because all fats taste good 
C)  B and E because the higher the molecular weight, the better the fat is 
D)  C and B because these molecules contain cis double bonds 
E)  A, D, and E because these molecules do not contain any double bonds

Question 8

A molecule has the molecular formula C5H10. This molecule could be a(n) ______ and a(n) _____.

Accepted Answer

A)  alkane, saturated hydrocarbon 
B)  alkane, unsaturated hydrocarbon 
C)  alkene, saturated hydrocarbon 
D)  alkene, unsaturated hydrocarbon. 
E)  alkene, alkyne. 
A)  alkane, saturated hydrocarbon 
B)  alkane, unsaturated hydrocarbon 
C)  alkene, saturated hydrocarbon 
D)  alkene, unsaturated hydrocarbon. 
E)  alkene, alkyne.

Question 9

Which of the following pairs of compounds are geometric isomers?

Accepted Answer

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

Question 10

What is the name of the following hydrocarbon?

Accepted Answer

A)  trans-3-pentane 
B)  trans-3-pentene 
C)  cis-3-pentane 
D)  trans-2-pentene 
E)  cis-2-pentene 
A)  trans-3-pentane 
B)  trans-3-pentene 
C)  cis-3-pentane 
D)  trans-2-pentene 
E)  cis-2-pentene

Question 11

How do IUPAC names differ from the brand names of pharmaceuticals?

Accepted Answer

A)  IUPAC names are systematic and brand names are not. 
B)  Brand names are systematic and IUPAC names are not. 
C)  IUPAC names are usually shorter than brand names. 
D)  Brand names are not used as frequently as IUPAC names. 
E)  IUPAC names do not follow a set of rules like brand names do. 
A)  IUPAC names are systematic and brand names are not. 
B)  Brand names are systematic and IUPAC names are not. 
C)  IUPAC names are usually shorter than brand names. 
D)  Brand names are not used as frequently as IUPAC names. 
E)  IUPAC names do not follow a set of rules like brand names do.

Question 12

Which of the following skeletal line structures are isomers?   I. II. III. IV.

Accepted Answer

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

Question 13

What is the IUPAC name of the following hydrocarbon?

Accepted Answer

A)  propane 
B)  propene 
C)  butane 
D)  pentene 
A)  propane 
B)  propene 
C)  butane 
D)  pentene

Question 14

How many hydrogens are attached to the carbons indicated below?

Accepted Answer

A)  C1: 2 C2: 0 
B)  C1: 0 C2: 2 
C)  C1: 1 C2: 1 
D)  C1: 0 C2: 1 
E)  C1: 1 C2: 0 
A)  C1: 2 C2: 0 
B)  C1: 0 C2: 2 
C)  C1: 1 C2: 1 
D)  C1: 0 C2: 1 
E)  C1: 1 C2: 0

Question 15

Which statement best describes the relationship between the following two structures?

Accepted Answer

A)  They are identical. 
B)  They have different molecular formulas. 
C)  They are isomers. 
D)  They are conformers. 
E)  One is an alkene and the other is an alkyne. 
A)  They are identical. 
B)  They have different molecular formulas. 
C)  They are isomers. 
D)  They are conformers. 
E)  One is an alkene and the other is an alkyne.

Question 16

A cyclohexane molecule and a benzene molecule are illustrated below. Which of the four statements describing the relationship between benzene and cyclohexane are true?   I. Benzene and cyclohexane have different molecular formulas. II. Benzene and cyclohexane are both flat.
III) Benzene and cyclohexane have different C-C bond lengths.
IV) Benzene is more flexible than cyclohexane.

Accepted Answer

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

Question 17

In which of the following choices are the alkenes correctly labeled?

Accepted Answer

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

Question 18

What is the parent chain name of the hydrocarbon below?

Accepted Answer

A)  butene 
B)  hexane 
C)  hexene 
D)  heptane 
E)  heptene 
A)  butene 
B)  hexane 
C)  hexene 
D)  heptane 
E)  heptene

Question 19

Which of the molecules below are branched?   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 are branched. 
A)  I only 
B)  II and IV 
C)  II, III, and IV 
D)  I and III 
E)  All of these molecules are branched.

Question 20

Which statement best describes the solubility of hydrocarbons?

Accepted Answer

A)  Hydrocarbons are soluble in water and therefore hydrophobic. 
B)  Hydrocarbons are insoluble in water and therefore hydrophobic. 
C)  Hydrocarbons are soluble in water and therefore hydrophilic. 
D)  Hydrocarbons do not dissolve in any solvent. 
E)  It is not possible to generalize the solubility of hydrocarbons. 
A)  Hydrocarbons are soluble in water and therefore hydrophobic. 
B)  Hydrocarbons are insoluble in water and therefore hydrophobic. 
C)  Hydrocarbons are soluble in water and therefore hydrophilic. 
D)  Hydrocarbons do not dissolve in any solvent. 
E)  It is not possible to generalize the solubility of hydrocarbons.

Which of the following elements is NOT a heteroatom?

Which of the following statements about alkanes is NOT true?

Which of the following condensed structures are branched and which are straight chains?

Is the following cycloalkane more or less abundant in nature than cyclohexane?

What is the molecular shape around the carbon indicated with an arrow?

A compound with the molecular formula C_nH_2n+2 is called a(n)or a .

Which of these fatty acids is considered a "good fat"?

A molecule has the molecular formula C₅H₁₀. This molecule could be a(n) __ and a(n) _.

Which of the following pairs of compounds are geometric isomers?

What is the name of the following hydrocarbon?

How do IUPAC names differ from the brand names of pharmaceuticals?

Which of the following skeletal line structures are isomers? I. II. III. IV.

What is the IUPAC name of the following hydrocarbon?

How many hydrogens are attached to the carbons indicated below?

Which statement best describes the relationship between the following two structures?

In which of the following choices are the alkenes correctly labeled?

What is the parent chain name of the hydrocarbon below?

Which of the molecules below are branched? I II III IV

Which statement best describes the solubility of hydrocarbons?

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

Filters

Exam 6: Organic Chemistry: Hydrocarbons

Which of the following elements is NOT a heteroatom?

Which of the following statements about alkanes is NOT true?

Which of the following condensed structures are branched and which are straight chains?

Is the following cycloalkane more or less abundant in nature than cyclohexane?

What is the molecular shape around the carbon indicated with an arrow?

A compound with the molecular formula CnH2n+2 is called a(n)______or a ______.

Which of these fatty acids is considered a "good fat"?

A molecule has the molecular formula C5H10. This molecule could be a(n) ______ and a(n) _____.

Which of the following pairs of compounds are geometric isomers?

What is the name of the following hydrocarbon?

How do IUPAC names differ from the brand names of pharmaceuticals?

Which of the following skeletal line structures are isomers? I. II. III. IV.

What is the IUPAC name of the following hydrocarbon?

How many hydrogens are attached to the carbons indicated below?

Which statement best describes the relationship between the following two structures?

In which of the following choices are the alkenes correctly labeled?

What is the parent chain name of the hydrocarbon below?

Which of the molecules below are branched? I II III IV

Which statement best describes the solubility of hydrocarbons?

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

Filters

A compound with the molecular formula C_nH_2n+2 is called a(n)or a .

A molecule has the molecular formula C₅H₁₀. This molecule could be a(n) __ and a(n) _.