Question
The correct order of decreasing acidic strength of trichloroacetic acid $$(A),$$ trifluoroacetic acid $$(B),$$ acetic acid $$(C)$$ and formic acid $$(D)$$ is
A.
$$B > A > D > C$$
B.
$$B > D > C > A$$
C.
$$A > B > C > D$$
D.
$$A > C > B > D$$
Answer :
$$B > A > D > C$$
Solution :
If an electron withdrawing group ( $$-I$$ - showing group ) is present, e.g. $$ - C{F_3}$$ has more ( $$-I$$ - effect ) withdrawing power than $$ - CC{l_3},$$ it makes the removal of proton more easy by stabilising the remaining carboxylate ion and thus, makes the acid more acidic.
The order of acidity of given compounds is
If an electron withdrawing group ( $$-I$$ - showing group ) is present, e.g. $$ - C{F_3}$$ has more ( $$-I$$ - effect ) withdrawing power than $$ - CC{l_3},$$ it makes the removal of proton more easy by stabilising the remaining carboxylate ion and thus, makes the acid more acidic.
The order of acidity of given compounds is