The weakest among the following acids is

Options

A. peroxyacetic acid
B. acetic acid
C. chloroacetic acid
D. trichloroacetic acid

Answer

A

Explanation

As `pK_(a)` value of `pK_(a) (CH_(3)COOH)=4.76`
`pK_(a) (CH_(2)Cl.COOH)=2.75`
`pK_(a) (C Cl_(3)COOH)= 0.65`
`pK_(a) (CH_(3) underset(underset(O)(||))(C )-O-O-H)=8.2`
and more be the value of `pK_(a)`, weaker be the acid. Hence, peroxyacetic acid is the weakest acid.