ORGANIC CHEMISTRY 7TH EDITION BY BROWN – TEST BANK
CHAPTER 3—STEREOISOMERISM AND CHIRALITY
MULTIPLE CHOICE
1. Which of the following is the definition of a pair of enantiomers?
|
a. |
A pair of structures that are superposable mirror images of one another |
|
b. |
A pair of stereoisomers that are non-superposable mirror images of one another |
|
c. |
A pair of stereoisomers that are not mirror images of one another |
|
d. |
A pair of stereoisomers that have equal specific rotations |
ANS: B
2. Which of the following is the definition of a pair of diastereomers?
|
a. |
A pair of structures that are superposable mirror images of one another |
|
b. |
A pair of stereoisomers that are non-superposable mirror images of one another |
|
c. |
A pair of stereoisomers that are not mirror images of one another |
|
d. |
A pair of stereoisomers that have equal specific rotations |
ANS: C
3. Which of the following is the definition of chirality?
|
a. |
The non-superposability of an object on its mirror image |
|
b. |
The superposability of an object on its mirror image |
|
c. |
A molecule that has a carbon atom with four different substituents |
|
d. |
A molecule with a mirror image |
ANS: A
4. Which of the following is the definition of a meso compound?
|
a. |
A molecule with stereocenter centers which is a chiral |
|
b. |
A molecule with stereocenter centers that is not chiral |
|
c. |
A diastereomer with no stereocenter centers |
|
d. |
A chiral compound with more than one stereocenter center |
ANS: B
5. Which of the following statements is not true regarding pairs of enantiomers?
|
a. |
They have identical melting points |
|
b. |
They have identical boiling points. |
|
c. |
They rotate plane-polarized light in opposite directions |
|
d. |
They react at identical rates with chiral reagents |
ANS:D
6. Which of the following statements is true?
|
a. |
All mirror images are enantiomers |
|
b. |
All molecules that have stereocenter centers are chiral |
|
c. |
Isomers that are not superposable on their mirror images are enantiomers |
|
d. |
Superposable structural isomers are enantiomers |
ANS: C
7. Which of the following structures is different from the other three?
|
a. |
1 |
|
b. |
2 |
|
c. |
3 |
|
d. |
4 |
ANS:D
8. Which of the following structures is different from the other three?
|
a. |
1 |
|
b. |
2 |
|
c. |
3 |
|
d. |
4 |
ANS: C
