question_answer

The correct order of increasing acid strength of the compounds (I) \[C{{H}_{3}}C{{O}_{2}}H\]                    (II) \[MeOC{{H}_{2}}C{{O}_{2}}H\] (III) \[C{{F}_{3}}C{{O}_{2}}H\]                  (IV)   AIEEE  Solved  Paper-2006

A) II < IV < I < III    

B) IV < I < III < II     

C) IV < I < II < III    

D) I < IV < III < II

Correct Answer: C

Solution :

\[-l\] effect increases acidity.      F \[+l\] effect decreases acidity. \[-C{{F}_{3}}\]exerting more \[-\,l\] effect than\[-\text{ }OMe\] \[M{{e}_{2}}CH-\]exerting more \[+\,l\] effect than\[C{{H}_{3}}\]