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Test Index
Class 12 NEET Chemistry Aldehydes, Ketones And Carboxylic Acids Part 1
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Question : 25
Total: 100
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (3), acetic acid (C) and formic acid (D) is
(2012)
B > A > D > C
B > D > C > A
A > B > C > D
A > C > B > D
Validate
Solution:
As
−
I
effect increases
−
C
O
O
H
group becomes more electron deficient and tendency to loose
H
+
ions increases i.e., acid strength increases.As
+
I
effect increases,acid strength decreases.
Thus correct order of acid strength is
C
F
3
C
O
O
H
>
C
C
l
3
C
O
O
H
>
H
C
O
O
H
>
C
H
3
C
O
O
H
(B) > (A) > (D) > (C)
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