Question

Between 4-cyanophenol and 3-cyanophenol,which is the most acidic phenol?

Answer 1

Explanation:

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Answer 2

4-cyanophenol will be the most acidic phenol.

This is because in 4-cyanophenol the anion formed will be stablilised by the

-M  effect of cyano group .

But in 3-cyanophenol the cyano group is on meta position and meta position does not show mesomeric effect.