Organic Chemistry 11th Edition by Francis Carey – Test Bank

Organic Chemistry 11th Edition by Francis Carey – Test Bank

Organic Chemistry, 11e (Carey)

Chapter 4   Chirality

1) Which object below is achiral?

A) golf club (wood driver)

B) baseball glove

C) tennis shoe

D) baseball bat

Answer:  D

Difficulty: 1 Easy

Section:  04.01

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Chiral vs achiral molecules

2) The most specific description of the relationship between the following two molecules is

A) identical.

B) isomers.

C) enantiomers.

D) diastereomers.

Answer:  A

Difficulty: 2 Medium

Section:  04.01

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereoisomers (enantiomers, diastereomers, meso)

3) Which of the molecules below are chiral?

A) only II

B) only III

C) I and III

D) II and III

Answer:  D

Difficulty: 1 Easy

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

4) Identify the chiral compound(s) below.

A) only II

B) II and III

C) III and IV

D) I, II, and IV

Answer:  A

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

5) Which of the following molecules are chiral?

A) only II

B) only III

C) II and III

D) I, II, and III

Answer:  A

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

6) How many chirality centers are there in the following molecule?

A) only 1

B) two

C) three

D) four

Answer:  B

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  3. Apply

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers

7) How many chirality centers are there in the following molecule?

A) only 1

B) two

C) three

D) four

Answer:  C

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  3. Apply

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

8) Which of the following statements are true?

I. If a molecule has a plane of symmetry it is achiral.

II. If a molecule has a center of symmetry it is achiral.

III. If a molecule has one chirality center it is chiral.

A) I and II

B) I and III

C) II and III

D) I, II, and III

Answer:  D

Difficulty: 1 Easy

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

9) Which compound below has no stereoisomers?

A) 1,2-dichlorobutane

B) 2,3-dichlorobutane

C) 1,3-dichlorobutane

D) 1,4-dichlorobutane

Answer:  D

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Stereoisomers (enantiomers, diastereomers, meso)

10) Which one of the isomeric C4H9Cl molecules is chiral?

A) 1-chlorobutane

B) 2-chlorobutane

C) 1-chloro-2-methylpropane

D) 2-chloro-2-methylpropane

Answer:  B

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  3. Apply

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

11) Which of the following molecules is(are) chiral?

A) only I

B) I and II

C) II and III

D) I, II, and III

Answer:  A

Difficulty: 2 Medium

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

12) How many chirality centers are present in histrionicotoxin?

A) 2

B) 3

C) 4

D) 5

Answer:  C

Difficulty: 3 Hard

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  3. Apply

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers

13) How many chirality centers are in this molecule?

A) 2

B) 4

C) 5

D) 6

Answer:  C

Difficulty: 3 Hard

Section:  04.02

Topic:  Stereochemistry

Bloom’s:  3. Apply

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers

14) Which of the molecules below are chiral?

A) only I

B) I and III

C) II and III

D) I, II, and III

Answer:  B

Difficulty: 2 Medium

Section:  04.03

Topic:  Stereochemistry

Bloom’s:  2. Understand

Chapter:  04

Subtopic:  Stereogenic/chirality carbon centers; Chiral vs achiral molecules

15) A pure sample of (S)-phenylalanine has a specific rotation of +70°. A mixture of the two enantiomers of phenylalanine has a specific rotation of +7.0°. What are the percentages of the S and R enantiomers in the mixture?

A) 95% S, 5% R

B) 90% S, 10% R

C) 55% S, 45% R

D) 52.5% S, 47.5% R

Answer:  C

Difficulty: 2 Medium

Section:  04.04

Topic:  Stereochemistry

Bloom’s:  3. Apply

Chapter:  04

Subtopic:  Optical activity