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