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Which of the following is the weakest ac...

Which of the following is the weakest acid?

A

`o`-Fluorophenol

B

`o`-Chlorophenol

C

`o`-Bromophenol

D

`o`-Iodophenol

Text Solution

Verified by Experts

The correct Answer is:
A
The decreasing order of acidic strength is
`o`-Chlorophenol gt `o`-Bromophenol gt `o`-Iodophenol gt `o`-Fluorophenol
Amongst `o`-halophenols,`o`-Flurophenol is the weakest acid due to strong intramolecular `H`-bonding.

The acidity of other halophenols decreases as the `-I_("effect")` of the halogen decreases.
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