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The correct order of decreasing acid str...

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

A

AgtBgtCgtD

B

AgtCgtBgtD

C

BgtAgtDgtC

D

BgtAgtCgtD

Text Solution

Verified by Experts

The correct Answer is:
C
Since F is more electronegative than Cl, therefore, `CF_(2)COOH(B)` is a stronger acid than `C Cl_(3)COOH`. Further, since +R-effect of `C_(6)H_(5)` group outweighs its -I-effect, therefore, `C_(6)H_(5)COOH(C)` is a weaker acid than HCOOH (D). Thus, the overall acid strength decreases in the order: BgtAgtDgtC.
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