question_answer

The correct order of decreasing acid strength of trichloroacedc acid , trifluoroacetic acid, acetic acid  and formic acid  is                                                                                                                          [AIPMT (S) 2012]

A)  B > A > D > C

B)     B > D > C > A

C)  A > B > C > D 

D)       A > C > B > D

Correct Answer: A

Solution :

If   an   electron   withdrawing   group (\[-I\] showing group) is present, it makes the removal of proton more easy by stabilizing the remaining carboxylate ion and thus, makes the acid more acidic.

The order of acidity of given compounds is