Question 1

A sample tube containing equal amounts of two enantiomers would be optically inactive.

Accepted Answer

A) True 
 B)False

Question 2

A nail is an example of a chiral object.

Accepted Answer

A) True 
 B)False

Question 3

cis-2-Butene and trans-2-butene are stereoisomers related as diastereomers.

Accepted Answer

A) True 
 B)False

Question 4

Which property of enantiomers is not identical?

Accepted Answer

A) Melting point 
B) Boiling point 
C) Solubility 
D) Specific rotation 
E) All of the above properties are identical for a pair of enantiomers. 
A) Melting point 
B) Boiling point 
C) Solubility 
D) Specific rotation 
E) All of the above properties are identical for a pair of enantiomers.

Question 5

How many enantiomers can a chiral stereoisomer have?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) The number of enantiomers depends on the number of chirality centers. 
A) 0 
B) 1 
C) 2 
D) The number of enantiomers depends on the number of chirality centers.

Question 6

The two structures shown below represent identical molecules.

Accepted Answer

A) True 
 B)False

Question 7

Consider the stereoisomers (A-E)drawn below:   Which structure(s)is/are a diastereomer of structure C?

Accepted Answer

A) structure A 
B) structure B 
C) structure D 
D) structure E 
E) None of the structures is a diastereomer of structure C. 
A) structure A 
B) structure B 
C) structure D 
D) structure E 
E) None of the structures is a diastereomer of structure C.

Question 8

In organic molecules, oxygen atoms cannot be chirality centers.

Accepted Answer

A) True 
 B)False

Question 9

How many chirality centers does the following molecule contain?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3

Question 10

There are six chirality centers in the simple sugar D-glucose, shown below.

Accepted Answer

A) True 
 B)False

Question 11

A carbonyl carbon is a common example of a chirality center.

Accepted Answer

A) True 
 B)False

Question 12

Consider the stereoisomers (A-E)drawn below:   Which structure is an enantiomer of structure A?

Accepted Answer

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

Question 13

Two enantiomers rotate plane polarized light to an equal extent but in opposite directions.

Accepted Answer

A) True 
 B)False

Question 14

Any molecule with one chirality center is a chiral compound.

Accepted Answer

A) True 
 B)False

Question 15

Which molecule is not an enantiomer of the molecule whose structure is shown below?

Accepted Answer

A)    
B)    
C)    
D) All the molecules above are enantiomers of the original structure. 
A)    
B)    
C)    
D) All the molecules above are enantiomers of the original structure.

Question 16

A human foot is a chiral object.

Accepted Answer

A) True 
 B)False

Question 17

All tertiary alcohols (3°)are chiral.

Accepted Answer

A) True 
 B)False

Question 18

A carbon atom bonded to four different groups is called a/an_____.

Accepted Answer

The answer of A carbon atom bonded to four different...

Question 19

Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug prescribed to treat tuberculosis (Mycobacterium tuberculosis). There are _____ chirality centers in ethambutol.

Accepted Answer

The answer of Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug...

Question 20

How are the structures below related?

Accepted Answer

A) identical molecules 
B) enantiomers 
C) constitutional isomers 
D) diastereomers 
A) identical molecules 
B) enantiomers 
C) constitutional isomers 
D) diastereomers

Exam 15: The Three-Dimensional Shape of Molecules

A sample tube containing equal amounts of two enantiomers would be optically inactive.

A nail is an example of a chiral object.

cis-2-Butene and trans-2-butene are stereoisomers related as diastereomers.

Which property of enantiomers is not identical?

How many enantiomers can a chiral stereoisomer have?

The two structures shown below represent identical molecules.

Consider the stereoisomers (A-E)drawn below: Which structure(s)is/are a diastereomer of structure C?

In organic molecules, oxygen atoms cannot be chirality centers.

How many chirality centers does the following molecule contain?

There are six chirality centers in the simple sugar D-glucose, shown below.

A carbonyl carbon is a common example of a chirality center.

Consider the stereoisomers (A-E)drawn below: Which structure is an enantiomer of structure A?

Two enantiomers rotate plane polarized light to an equal extent but in opposite directions.

Any molecule with one chirality center is a chiral compound.

Which molecule is not an enantiomer of the molecule whose structure is shown below?

A human foot is a chiral object.

All tertiary alcohols (3°)are chiral.

A carbon atom bonded to four different groups is called a/an_____.

Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug prescribed to treat tuberculosis (Mycobacterium tuberculosis). There are _____ chirality centers in ethambutol.

How are the structures below related?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Gases, Liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

Aldehydes and Ketones

Carboxylic Acids, Esters, and Amides

Amines and Neurotransmitters

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Digestion and the Conversion of Food Into Energy

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