Aldehydes Ketones Question 27

Question: Which of the following orders of relative strengths of acids is correct-

Options:

A) $ FCH_2COOH>ClCH_2COOH>BrCH_2COOH $

B) $ ClCH_2COOH>BrCH_2COOH>FCH_2COOH $

C) $ BrCH_2COOH>ClCH_2COOH>FCH_2COOH $

D) $ ClCH_2CO_2H>FCH_2COOH>BrCH_2COOH $

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Answer:

Correct Answer: A

Solution:

[a] $ F-CH_2-\overset{O}{\mathop{\overset{||}{\mathop{C}}}}-OH>\underset{\begin{smallmatrix} (Electron-withdrawingcharacter \\ decreasingfromLtoR) \end{smallmatrix}}{\mathop{Cl-CH_2-\overset{O}{\mathop{\overset{||}{\mathop{C}}}}-OH>}} $

$ Br-CH_2-\overset{O}{\mathop{\overset{|}{\mathop{C}}}}-OH $