Carboxylic Acids Question 77

Question: Which of the following would be expected to be most highly ionised in water

[AIIMS 1982]

Options:

A) $ CH_2ClCH_2CH_2COOH $

B) $ CH_3CHCl.CH_2.COOH $

C) $ CH_3.CH_2.CCl_2.COOH $

D) $ CH_3.CH_2.CHCl.COOH $

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Answer:

Correct Answer: C

Solution:

$ CH_3-CH_2-CCl_2-COOH $ ; a,a-dichloro butanoic acid is most acidic. Hence it will easily loose $ {H^{+}} $ ions in solution.