Organic Chemistry A Brief Course International Edition 13th Edition by David J. Hart – Test Bank
Chapter 5 — Stereoisomerism
MULTIPLE CHOICE
1. Which of the following objects is chiral?
|
A) |
egg |
|
B) |
pencil |
|
C) |
cross country skis |
|
D) |
paperclip |
|
E) |
shoes |
ANS: E TOP: Definitions
2. Chiral molecules that have non-superimposable mirror images are called:
|
A) |
enantiomers |
|
B) |
diastereomers |
|
C) |
Meso compounds |
|
D) |
stereogenic |
|
E) |
symmetrical |
ANS: A TOP: Definitions
3. Which of the following molecules has a mirror plane of symmetry?
|
|
|
A) |
1 |
|
B) |
2 |
|
C) |
3 |
|
D) |
4 |
|
E) |
all of them |
ANS: B TOP: Definitions
4. What is the process that separates enantiomers?
|
A) |
separation |
|
B) |
decoupling |
|
C) |
resetting |
|
D) |
resolution |
|
E) |
selective binding |
ANS: D TOP: Definitions
5. A 50:50 mixture of enantiomers
|
A) |
is a meso form. |
|
B) |
is a pair of diastereomers. |
|
C) |
is a racemic mixture. |
|
D) |
rotates plane-polarized light. |
|
E) |
is a pair of conformers. |
ANS: C TOP: Definitions
6. The terms that best describe the isomeric relationship between staggered and eclipsed ethane are
|
A) |
configurational, achiral, diastereomers. |
|
B) |
conformational, chiral, enantiomers. |
|
C) |
conformational, achiral, diastereomers. |
|
D) |
configurational, chiral, enantiomers. |
|
E) |
conformational, achiral, enantiomers. |
ANS: C TOP: Definitions
7. Which of the molecules below has a stereogenic carbon atom?
|
|
|
A) |
1 |
|
B) |
2 |
|
C) |
3 |
|
D) |
2 and 3 |
|
E) |
1, 2, and 3 |
ANS: B TOP: Definitions
8. How many stereogenic centers are present in the following molecule?
|
|
|
A) |
1 |
|
B) |
2 |
|
C) |
3 |
|
D) |
4 |
|
E) |
5 |
ANS: B TOP: Definitions
9. How many stereogenic centers are present in the following molecule?
|
|
|
A) |
1 |
|
B) |
2 |
|
C) |
4 |
|
D) |
6 |
|
E) |
8 |
ANS: B TOP: Definitions
10. How many chiral stereoisomers can be drawn for CH3CHClCHBrCH3?
|
A) |
1 |
|
B) |
2 |
|
C) |
3 |
|
D) |
4 |
|
E) |
8 |
ANS: D TOP: Definitions
11. How many stereogenic carbons are in the following molecule?
|
|
|
A) |
0 |
|
B) |
1 |
|
C) |
2 |
|
D) |
3 |
|
E) |
4 |
ANS: A TOP: Definitions
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