Carboxylic Acids Question 55
Question: Which acid is strongest or Which is most acidic
[CPMT 1982, 89; BIT 1992; MP PET 1996; MP PMT/PET 1988; MP PMT 1995, 97;RPMT 1997]
Options:
A) $ Cl_2CH.COOH $
B) $ ClCH_2COOH $
C) $ CH_3COOH $
D) $ Cl_3C.COOH $
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Answer:
Correct Answer: D
Solution:
Presence of -I effect chlorine atom increases the acidic nature by withdrawing electrons $ \underset{\begin{smallmatrix} Trichloroacetic \\ \text{acid (Most}\text{acidic)} \end{smallmatrix}}{\mathop{Cl_3CCOOH>}}\underset{\text{Dichloro acetic acid}}{\mathop{Cl_2CHCOOH}}>\underset{Monochloro\text{acetic acid}}{\mathop{Cl-CH_2-COOH>}}\underset{\begin{smallmatrix} \text{Acetic acid} \\ \text{(Least acidic)} \end{smallmatrix}}{\mathop{CH_3COOH}} $
BETA
