| ethanol (I) |
| 2, 2, 2-trifluoroethanol (II), |
| trifluroacetic acid (III) |
| and acetic acid (IV) |
| is |
A) \[III\text{ }>\text{ }II\text{ }>\text{ }IV\text{ }>\text{ }I\]
B) \[IV\text{ }>\text{ }III\text{ }>\text{ }II\text{ }>\text{ }I\]
C) \[I\text{ }>\text{ }II\text{ }>\text{ }III\text{ }>\text{ }IV\]
D) \[III\text{ }>\text{ }IV\text{ }>\text{ }II\text{ }>\text{ }I\]
Correct Answer: A
Solution :
The acidic character increases with increasing number of electron withdrawing substituents on the a-carbon. Hence, trifluoroacetic acid is more acidic than acetic acid. Further carboxylic acids are more stronger acid than alcohols but due to the presence of three electron withdrawing group (\[F\]group), 2, 2, 2, trifluoroethanol is more acidic than acetic acid.
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