What of the following is expected to be most highly ionised in water ?

Options

A. `CH_(2)ClCH_(2)CH_(2)COOH`
B. `CH_(3)CHCl.CH_(2).COOH`
C. `CH_(3)CH_(2).CCl.COOH`
D. `CH_(3)CH_(2)CHCl.COOH`

Answer

C

Explanation

`CH_(3)-CH_(2)-CCl_(2)-COOH, alpha, alpha` dichloro butanoic acid is most acidic. Hence it will easily loose `H^(+)` ions in solution.