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

Options

A. A `gt` B `gt` C `gt` D
B. B `gt` A `gt` D `gt` C
C. A `gt` C `gt` B `gt` D
D. B `gt` D `gt` C `gt` A

Answer

B

Explanation

`Clleftarrowoverset(Cl)overset(uparrow)underset((A))underset(Cl)undersetdownarrow(C)-overset(O)overset(||)C-OH" "Fleftarrowoverset(F)overset(uparrow)underset(downarrow)C-overset(O)overset(||)C-OH`
`H-overset(H)overset(|)underset(H)underset(downarrow)C-overset(O)overset(||)C-OH" "H-overset(O)overset(||)(C)-OH`
The presence of electron withrawing gp, in carboxylic acid increase acidic character. Also electronn withrawing nature of `F` is more than `CI`