Question

The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is :​

Answer 1

B>A>D>C is the correct order of acidic strength.

Answer 2

order will be
B> A> D> C
This is because 3 fluorine atoms will increase -i effect and hence acidic strength increases

then comes chlorine atom to increase -i effect

then comes formic acid (HCOOH) bcoz H atom neither decreases acidic strength nor increases.

lastly comes CH3COOH in which CH3 group decreases acidic strength due to +I character