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Which of the following compounds would h...

Which of the following compounds would have the smallest value of `pK_(a)`?

A

`CHF_(2)CH_(2)CH_(2)COOH`

B

`CH_(3)CH_(2)CF_(2)COOH`

C

`CH_(2)FCHFCH_(2)COOH`

D

`CH_(2)CF_(2)CH_(2)COOH`

Text Solution

Verified by Experts

The correct Answer is:
B
`CH_(3)CH_(2)CF_(2)COOH` having two strongly electronegative F atoms at the `alpha`-position is the strongest acid and hence has the smallest `pK_(a)`.
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