Question 1

Which of the following are gauche conformers?

Accepted Answer

A) I and II 
B) I and III 
C) II and IV 
D) II and III 
A) I and II 
B) I and III 
C) II and IV 
D) II and III B

Question 2

Which formula represents a cycloalkane with 5 carbons?

Accepted Answer

A) C5H8 
B) C5H10 
C) C5H12 
D) C5H14 
A) C5H8 
B) C5H10 
C) C5H12 
D) C5H14 B

Question 3

Rank the following alkanes in order of increasing boiling point.

Accepted Answer

A) I > II > III > IV 
B) IV > III > II > I 
C) II > III > IV > I 
D) IV > III > I > II 
A) I > II > III > IV 
B) IV > III > II > I 
C) II > III > IV > I 
D) IV > III > I > II B

Question 4

Which of the following compounds has only primary and secondary hydrogen atoms?

Accepted Answer

A) 2-Methylpentane 
B) 2,2,3-Trimethylpentane 
C) 3-Methylpentane 
D) 2,2-Dimethylpentane 
A) 2-Methylpentane 
B) 2,2,3-Trimethylpentane 
C) 3-Methylpentane 
D) 2,2-Dimethylpentane

Question 5

Select the most stable conformer of cis-1,3-cyclohexanediol. .

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 6

What is the IUPAC name for the following compound?

Accepted Answer

A) 5-Ethyl-3,6-dimethylheptane 
B) 3-Ethyl-2,5-dimethylheptane 
C) 3-Ethyl-2,5-dimethyloctane 
D) 5-Ethyl-3,6-dimethyloctane 
A) 5-Ethyl-3,6-dimethylheptane 
B) 3-Ethyl-2,5-dimethylheptane 
C) 3-Ethyl-2,5-dimethyloctane 
D) 5-Ethyl-3,6-dimethyloctane

Question 7

What is the IUPAC name for the following alkane?

Accepted Answer

A) 3-isopropyl-6-methyloctane 
B) 3-isopropyl-3.7-methyloctane 
C) 3-ethyl-2,6-dimethyloctane 
D) 6-ethyl-3,7-dimethyloctane 
A) 3-isopropyl-6-methyloctane 
B) 3-isopropyl-3.7-methyloctane 
C) 3-ethyl-2,6-dimethyloctane 
D) 6-ethyl-3,7-dimethyloctane

Question 8

Which of the following compounds has primary,secondary,tertiary,and quaternary carbon atoms?

Accepted Answer

A) Pentane 
B) 2-Methylpentane 
C) 2,2-Dimethylpentane 
D) 2,2,3-Trimethylpentane 
A) Pentane 
B) 2-Methylpentane 
C) 2,2-Dimethylpentane 
D) 2,2,3-Trimethylpentane

Question 9

What is the common name of the following alkyl group?

Accepted Answer

A) Isobutyl 
B) sec-Butyl 
C) Isopropyl 
D) tert-Butyl 
A) Isobutyl 
B) sec-Butyl 
C) Isopropyl 
D) tert-Butyl

Question 10

What is the IUPAC name for the following compound?

Accepted Answer

A) 2,3-Dimethyl-4-sec-butylheptane 
B) 4-sec-Butyl-2,3-dimethylheptane 
C) 3,5,6-Trimethyl-4-propylheptane 
D) 2,3,5-Trimethyl-4-propylheptane 
A) 2,3-Dimethyl-4-sec-butylheptane 
B) 4-sec-Butyl-2,3-dimethylheptane 
C) 3,5,6-Trimethyl-4-propylheptane 
D) 2,3,5-Trimethyl-4-propylheptane

Question 11

What is the IUPAC name for the following alkane?

Accepted Answer

A) 2,5,6,7-tetramethyloctane 
B) 2,3,4,7-tetramethyloctane 
C) 2,5,6,7-tetramethylheptane 
D) 2,3,4,7-tetramethylheptane 
A) 2,5,6,7-tetramethyloctane 
B) 2,3,4,7-tetramethyloctane 
C) 2,5,6,7-tetramethylheptane 
D) 2,3,4,7-tetramethylheptane

Question 12

Which of the following statements about alkanes is true?

Accepted Answer

A) Alkanes are aliphatic hydrocarbons having only C-C and C-H p bonds. 
B) Cyclic alkanes have two fewer H atoms than acyclic alkanes with the same number of carbons. 
C) Acyclic alkanes contain carbons joined in one or more rings. 
D) Acyclic alkanes have the general molecular formula CnH2n. 
A) Alkanes are aliphatic hydrocarbons having only C-C and C-H p bonds. 
B) Cyclic alkanes have two fewer H atoms than acyclic alkanes with the same number of carbons. 
C) Acyclic alkanes contain carbons joined in one or more rings. 
D) Acyclic alkanes have the general molecular formula CnH2n.

Question 13

Which of the following is not another representation for 2-methylbutane?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 14

Which of the following cycloalkanes has the least angle strain?

Accepted Answer

A) Cyclopropane 
B) Cyclohexane 
C) Cyclopentane 
D) Cycloheptane 
A) Cyclopropane 
B) Cyclohexane 
C) Cyclopentane 
D) Cycloheptane

Question 15

Rank the conformers of 1,2,4-trimethylcyclohexane in order of decreasing stability,putting the most stable first.

Accepted Answer

A) I > II > III > IV 
B) III > II > IV > I 
C) III > IV > II > I 
D) I > II > IV > III 
A) I > II > III > IV 
B) III > II > IV > I 
C) III > IV > II > I 
D) I > II > IV > III

Question 16

What is the approximate C-C-C bond angle in propane?

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180°

Question 17

Which of the following are anti conformers?

Accepted Answer

A) I and II 
B) II and III 
C) I and IV 
D) II and IV 
A) I and II 
B) II and III 
C) I and IV 
D) II and IV

Question 18

Which of the following statements about alkanes is not true?

Accepted Answer

A) Alkanes are aliphatic hydrocarbons. 
B) Alkanes contain only C-C and C-H s bonds. 
C) Alkanes are acyclic or cyclic. 
D) Acyclic alkanes have two fewer H atoms than cyclic alkanes with the same number of carbons. 
A) Alkanes are aliphatic hydrocarbons. 
B) Alkanes contain only C-C and C-H s bonds. 
C) Alkanes are acyclic or cyclic. 
D) Acyclic alkanes have two fewer H atoms than cyclic alkanes with the same number of carbons.

Question 19

What is the relation between the following pair of compounds?

Accepted Answer

A) Constitutional isomers 
B) Stereoisomers 
C) Identical molecules 
D) Not isomers of each other 
A) Constitutional isomers 
B) Stereoisomers 
C) Identical molecules 
D) Not isomers of each other

Question 20

What is the alternate chair conformation of the following compound?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Exam 4: Alkanes

Which of the following are gauche conformers?

Which formula represents a cycloalkane with 5 carbons?

Rank the following alkanes in order of increasing boiling point.

Which of the following compounds has only primary and secondary hydrogen atoms?

Select the most stable conformer of cis-1,3-cyclohexanediol. .

What is the IUPAC name for the following compound?

What is the IUPAC name for the following alkane?

Which of the following compounds has primary,secondary,tertiary,and quaternary carbon atoms?

What is the common name of the following alkyl group?

What is the IUPAC name for the following compound?

What is the IUPAC name for the following alkane?

Which of the following statements about alkanes is true?

Which of the following is not another representation for 2-methylbutane?

Which of the following cycloalkanes has the least angle strain?

Rank the conformers of 1,2,4-trimethylcyclohexane in order of decreasing stability,putting the most stable first.

What is the approximate C-C-C bond angle in propane?

Which of the following are anti conformers?

Which of the following statements about alkanes is not true?

What is the relation between the following pair of compounds?

What is the alternate chair conformation of the following compound?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation,resonance,and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

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