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Which of the following acids has the sma...

Which of the following acids has the smallest dissociation constant-

A

`CH_(3)CHFCOOH`

B

`FCH_(2)CH_(2)COOH`

C

`BrCH_(2)CH_(2)COOH`

D

`CH_(3)CHBrCOOH`

Text Solution

Verified by Experts

The correct Answer is:
C
`BrCH_(2)CH_(2)COOH` is least acidic or less `K_(a)`, i.e., dissociation constant . It is (a) due to lesser -I effect of Br than F and (b) Br atom further away from -COOH group.
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