Question 1

What is the index of hydrogen deficiency in C20H36?

Accepted Answer

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

Question 2

Match the following.
-

Accepted Answer

A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol 
A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol C

Question 3

Which of the following compounds is an ester?

Accepted Answer

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

Question 4

What is the index of hydrogen deficiency?

Accepted Answer

The index of hydrogen deficien

Question 5

Which of the following structures are constitutional isomers of a compound with molecular formula C4H9N?

Accepted Answer

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

Question 6

Which compound is a saturated hydrocarbon?

Accepted Answer

A)  1-butyne 
B)  acetylene 
C)  3-methylheptane 
D)  2-methylheptene 
E)  ethene 
A)  1-butyne 
B)  acetylene 
C)  3-methylheptane 
D)  2-methylheptene 
E)  ethene

Question 7

What are functional groups and how are they related to the concept of organic families? Provide examples.

Accepted Answer

A functional group is a characteristic a

Question 8

Which of the following acyclic compounds is an alkene with one double bond in its structure?

Accepted Answer

A)  C10H22 
B)  C11H22 
C)  C12H22 
D)  C6H10 
E)  C5H8 
A)  C10H22 
B)  C11H22 
C)  C12H22 
D)  C6H10 
E)  C5H8

Question 9

Which of the following condensed general formulas represents aldehydes?

Accepted Answer

A)  ROR 
B)  RCOR 
C)  RCHO 
D)  ROH 
E)  RCOOH 
A)  ROR 
B)  RCOR 
C)  RCHO 
D)  ROH 
E)  RCOOH

Question 10

Determine the absolute configuration of the molecule shown below:

Accepted Answer

A)  S configuration 
B)  R configuration 
C)  E configuration 
D)  Z configuration 
E)  d configuration 
A)  S configuration 
B)  R configuration 
C)  E configuration 
D)  Z configuration 
E)  d configuration

Question 11

Match the following.
-

Accepted Answer

A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol 
A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol

Question 12

How many isomers are there for C5H12?

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
A)  3 
B)  4 
C)  5 
D)  6

Question 13

Match the following.
-

Accepted Answer

A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol 
A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol

Question 14

What is the index of hydrogen deficiency in C10H12N2O3?

Accepted Answer

A)  5 
B)  4 
C)  3 
D)  2 
E)  6 
A)  5 
B)  4 
C)  3 
D)  2 
E)  6

Question 15

Match the following.
-

Accepted Answer

A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol 
A) amine 
B) ketone 
C) aldehyde 
D) carboxylic acid 
E) ester
F)alcohol

Question 16

Which of the following lists the substituents in the order of priority, from highest (priority 1) to lowest (priority 4)?

Accepted Answer

A)  -NH2, -C(=O)H, -COOH, -CH3 
B)  -CH3, -COOH, -C(=O)H, -NH2 
C)  -NH2, -CH3, -C(=O)H, -COOH 
D)  -NH2, -COOH, -C(=O)H, -CH3 
E)  -NH2, -CH3, -COOH, -C(=O)H 
A)  -NH2, -C(=O)H, -COOH, -CH3 
B)  -CH3, -COOH, -C(=O)H, -NH2 
C)  -NH2, -CH3, -C(=O)H, -COOH 
D)  -NH2, -COOH, -C(=O)H, -CH3 
E)  -NH2, -CH3, -COOH, -C(=O)H

Question 17

When does conjugation occur?

Accepted Answer

A)  Conjugation occurs every time an organic molecule has a heteroatom in its structure regardless of hybridization. 
B)  Conjugation occurs every time an organic molecule has a sequence of three or more sp2 hybridized atoms. 
C)  Conjugation occurs every time an organic molecule has a sequence of three or more sp3 hybridized atoms. 
D)  Conjugation occurs every time an organic molecule has a sequence of two or more sp2 hybridized atoms. 
E)  Conjugation occurs every time an organic molecule has a ring-type structure. 
A)  Conjugation occurs every time an organic molecule has a heteroatom in its structure regardless of hybridization. 
B)  Conjugation occurs every time an organic molecule has a sequence of three or more sp2 hybridized atoms. 
C)  Conjugation occurs every time an organic molecule has a sequence of three or more sp3 hybridized atoms. 
D)  Conjugation occurs every time an organic molecule has a sequence of two or more sp2 hybridized atoms. 
E)  Conjugation occurs every time an organic molecule has a ring-type structure.

Question 18

Which of the following statements is TRUE?

Accepted Answer

A)  Organic halides are polar molecules with C-X bond polarity increasing in order C-Br < C-I < C-Cl < C-F. 
B)  Alkenes are hydrocarbons that contain one or more C=C bonds and therefore must have some carbons sp hybridized. 
C)  Amines are organic compounds that contain nitrogen and have R-C(=O)-NH-R as their general formula. 
D)  Ethers are a family of organic compounds that contain oxygen and have the general formula R-O-R. 
E)  Because alcohols contain nonpolar C-H bonds, they cannot mix with water. 
A)  Organic halides are polar molecules with C-X bond polarity increasing in order C-Br < C-I < C-Cl < C-F. 
B)  Alkenes are hydrocarbons that contain one or more C=C bonds and therefore must have some carbons sp hybridized. 
C)  Amines are organic compounds that contain nitrogen and have R-C(=O)-NH-R as their general formula. 
D)  Ethers are a family of organic compounds that contain oxygen and have the general formula R-O-R. 
E)  Because alcohols contain nonpolar C-H bonds, they cannot mix with water.

Question 19

The general formula for alkanes is CnH2n+2. What is the value of n in 4-methylethylheptane? Is this molecule chiral?

Accepted Answer

A)  n = 9; yes, it is chiral 
B)  n = 9; no, it is not chiral 
C)  n = 10; yes, it is chiral 
D)  n = 10; no, it is not chiral 
E)  n = 7; yes, it is chiral 
A)  n = 9; yes, it is chiral 
B)  n = 9; no, it is not chiral 
C)  n = 10; yes, it is chiral 
D)  n = 10; no, it is not chiral 
E)  n = 7; yes, it is chiral

Question 20

Which of the following compounds exhibit cis-trans isomerism?

Accepted Answer

A)  CH2=CH2 
B)  CH2=CCl2 
C)  CBr2=CHBr 
D)  CHCl=CHCl 
E)  (CH3)2C=CH-CH2CH3 
A)  CH2=CH2 
B)  CH2=CCl2 
C)  CBr2=CHBr 
D)  CHCl=CHCl 
E)  (CH3)2C=CH-CH2CH3

Exam 20: Organic Chemistry I: Structures

What is the index of hydrogen deficiency in C20H36?

Match the following. -

Which of the following compounds is an ester?

What is the index of hydrogen deficiency?

Which of the following structures are constitutional isomers of a compound with molecular formula C4H9N?

Which compound is a saturated hydrocarbon?

What are functional groups and how are they related to the concept of organic families? Provide examples.

Which of the following acyclic compounds is an alkene with one double bond in its structure?

Which of the following condensed general formulas represents aldehydes?

Determine the absolute configuration of the molecule shown below:

Match the following. -

How many isomers are there for C5H12?

Match the following. -

What is the index of hydrogen deficiency in C10H12N2O3?

Match the following. -

Which of the following lists the substituents in the order of priority, from highest (priority 1) to lowest (priority 4)?

When does conjugation occur?

Which of the following statements is TRUE?

The general formula for alkanes is CnH2n+2. What is the value of n in 4-methylethylheptane? Is this molecule chiral?

Which of the following compounds exhibit cis-trans isomerism?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What is the index of hydrogen deficiency in C₂₀H₃₆?

Which of the following structures are constitutional isomers of a compound with molecular formula C₄H₉N?

How many isomers are there for C₅H₁₂?

What is the index of hydrogen deficiency in C₁₀H₁₂N₂O₃?

The general formula for alkanes is C_nH₂_n₊₂. What is the value of n in 4-methylethylheptane? Is this molecule chiral?