Which of the following acids has the smallest | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The dissociation constant $(K_a)$ of a carboxylic acid is directly proportional to its acidity. The acidity is increased by the electron-withdrawi

Vedclass · Accepted Answer

$BrCH_2CH_2COOH$

Vedclass · Answer

(C) The dissociation constant $(K_a)$ of a carboxylic acid is directly proportional to its acidity. The acidity is increased by the electron-withdrawing inductive effect ($-I$ effect) of substituents.$1$. Comparing the substituents: $F$ has a stronger $-I$ effect than $Br$.$2$. Comparing the position: The closer the substituent is to the $-COOH$ group,the stronger the $-I$ effect.$3$. In $CH_3CHFCOOH$ and $CH_3CHBrCOOH$,the halogen is on the $\alpha$-carbon,exerting a strong $-I$ effect.$4$. In $FCH_2CH_2COOH$ and $BrCH_2CH_2COOH$,the halogen is on the $\beta$-carbon,exerting a weaker $-I$ effect.$5$. Between $FCH_2CH_2COOH$ and $BrCH_2CH_2COOH$,$Br$ has a weaker $-I$ effect than $F$.Therefore,$BrCH_2CH_2COOH$ has the weakest $-I$ effect,making it the least acidic and thus having the smallest dissociation constant $(K_a)$.

Which of the following acids has the smallest dissociation constant?

Similar Questions

Heating a mixture of ethyl alcohol and acetic acid in the presence of conc. $H_2SO_4$ produces a fruity-smelling compound. This reaction is called:

Identify $X, Y$ and $Z$ in the following reaction sequence:
$C_6H_5CH_2CH_2OH$ $\xrightarrow{X} C_6H_5CH_2COOH$ $\xrightarrow{Y} Z$

The reaction of acetamide with water is an example of

Which of the following is the strongest acid?

What is $A$ in the following reaction?

Vedclass Test Series

Exam Paper Generator

Online Exam Module