The decreasing order of acidic strength for following acids is
(a) `CH_3COOH` , (b)`CH_3CH ClCH_2COOH` , (c ) `ClCH_2COOH` , (d) `Cl_2CHCOOH`

Options

A. (b) gt (c ) gt (a) gt (d)
B. (d) gt (c ) gt (b) gt (a)
C. (d) gt (b) gt (c ) gt (a)
D. (c ) gt (d) gt (b) gt (a)

Answer

B

Explanation

Acid strength for acids increases with increase in electron withdrawing effect and decreases with electron donating effect.
(a)`CH_3COOH CH_3 rArr ` -COOH - It contains one donating group i.e., `CH_3` bonded with - COOH group
(b)` underset((CH_3))(CH_3CH)Cl CH_2COOH rArr CH_3- underset(Cl)underset|CH-CH_2-COOH` - It has one withdrawing group (Cl) and one donating group
(c ) `ClCH_2COOH rArr Cl - CH_2-COOH` - It has one withdrawing group (Cl)
(d) `Cl_2CHCOOH rArr Cl_2- CH-COOH` - It has two withdrawing groups (Cl)
Thus, (d) > (c ) > (b) > (a)