Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Another term in common use for a chirality center is an asymmetric carbon.

Accepted Answer

A) True 
 B)False

Question 3

The Fischer projection shown on the right properly represents the ball and stick model of the compound shown on the left.

Accepted Answer

A) True 
 B)False

Question 4

cis-2-butene and trans-2-butene are enantiomers.

Accepted Answer

A) True 
 B)False

Question 5

Diastereomers are stereoisomers that are ________.

Accepted Answer

A) mirror images of each other 
B) not mirror images of each other 
C) nonsuperimposable mirror images of each other 
D) superimposable on each other 
A) mirror images of each other 
B) not mirror images of each other 
C) nonsuperimposable mirror images of each other 
D) superimposable on each other

Question 6

Carvone,shown below,is a chiral compound that exists as a pair of enantiomers. One enantiomer has the odor of caraway,and the other enantiomer has the odor of spearmint. Identify the chirality center(s)in carvone.

Accepted Answer

A) C1 
B) C2 
C) C3 
D) C4 
E) C1 and C3 
A) C1 
B) C2 
C) C3 
D) C4 
E) C1 and C3

Question 7

All molecules that have carbons with a tetrahedral shape are chiral.

Accepted Answer

A) True 
 B)False

Question 8

Which compound has the most stereoisomers?

Accepted Answer

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

Question 9

Which object is chiral?

Accepted Answer

A) A sock 
B) A shoe 
C) A baseball 
D) A fork 
E) More than one of the objects is chiral. 
A) A sock 
B) A shoe 
C) A baseball 
D) A fork 
E) More than one of the objects is chiral.

Question 10

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 11

The Fischer projection shown on the right properly represents the three-dimensional compound shown on the left.

Accepted Answer

A) True 
 B)False

Question 12

Which,if any,of the labeled carbon atoms in the compound below is a chirality center?

Accepted Answer

A) C1 is the only chirality center. 
B) C2 is the only chirality center. 
C) Both C1 and C2 are chirality centers. 
D) Neither C1 nor C2 are chirality centers. 
A) C1 is the only chirality center. 
B) C2 is the only chirality center. 
C) Both C1 and C2 are chirality centers. 
D) Neither C1 nor C2 are chirality centers.

Question 13

Which molecule is chiral?

Accepted Answer

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

Question 14

Which nonsteroidal anti-inflammatory drug(s)(NSAID)is/are sold as a racemic mixture?

Accepted Answer

A) Naproxen 
B) Ibuprofen 
C) Both Naproxen and Ibuprofen are sold as a racemic mixture. 
D) Neither Naproxen nor Ibuprofen are sold as a racemic mixture. 
A) Naproxen 
B) Ibuprofen 
C) Both Naproxen and Ibuprofen are sold as a racemic mixture. 
D) Neither Naproxen nor Ibuprofen are sold as a racemic mixture.

Question 15

Which,if any,of the labeled carbon atoms in the compound below is a chirality center?

Accepted Answer

A) C2 is the only chirality center. 
B) C2,C3,and C4 and all chirality centers. 
C) C3 and C4 are both chirality centers 
D) C2 and C4 and both chirality centers 
E) C1 and C3 are both chirality centers 
A) C2 is the only chirality center. 
B) C2,C3,and C4 and all chirality centers. 
C) C3 and C4 are both chirality centers 
D) C2 and C4 and both chirality centers 
E) C1 and C3 are both chirality centers

Question 16

Which choice shows the given molecule correctly represented as a Fischer projection?

Accepted Answer

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

Question 17

A chiral molecule has at least one carbon atom that has four different substituents bonded to it.

Accepted Answer

A) True 
 B)False

Question 18

A sample containing an equal amount of two enantiomers is called a/an ________ mixture.

Accepted Answer

The answer of A sample containing an equal amount of...

Question 19

The compound 3,6-diethyl-6-methyl-3-decanethiol is a chiral molecule with more than one chirality center.

Accepted Answer

A) True 
 B)False

Question 20

The Fischer projection for threose,a tetrose sugar,is shown below. How many chirality centers are in threose?

Accepted Answer

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

Exam 15: The Three-Dimensional Shape of Molecules

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

Another term in common use for a chirality center is an asymmetric carbon.

The Fischer projection shown on the right properly represents the ball and stick model of the compound shown on the left.

cis-2-butene and trans-2-butene are enantiomers.

Diastereomers are stereoisomers that are ________.

Carvone,shown below,is a chiral compound that exists as a pair of enantiomers. One enantiomer has the odor of caraway,and the other enantiomer has the odor of spearmint. Identify the chirality center(s)in carvone.

All molecules that have carbons with a tetrahedral shape are chiral.

Which compound has the most stereoisomers?

Which object is chiral?

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

The Fischer projection shown on the right properly represents the three-dimensional compound shown on the left.

Which,if any,of the labeled carbon atoms in the compound below is a chirality center?

Which molecule is chiral?

Which nonsteroidal anti-inflammatory drug(s)(NSAID)is/are sold as a racemic mixture?

Which,if any,of the labeled carbon atoms in the compound below is a chirality center?

Which choice shows the given molecule correctly represented as a Fischer projection?

A chiral molecule has at least one carbon atom that has four different substituents bonded to it.

A sample containing an equal amount of two enantiomers is called a/an ________ mixture.

The compound 3,6-diethyl-6-methyl-3-decanethiol is a chiral molecule with more than one chirality center.

The Fischer projection for threose,a tetrose sugar,is shown below. How many chirality centers are in threose?

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

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

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