Inductive effects of halogens The Wikipedia page on inductive effects states that the order of inductive effects of halogens is as follows:

$$\ce{-F} &gt; \ce{-Cl} &gt; \ce{-Br} &gt; \ce{-I}$$

From this, and from the fact that electronegativity of fluorine is higher than that of chlorine, I guessed that the acidity of p-fluorophenol is more than p-chlorophenol. 

But the $\mathrm{p}K_\mathrm{a}$ values are:


p-fluorophenol: 9.8
p-chlorophenol: 9.4


Where did I go wrong? Why does this discrepancy occur? Detailed explanations are very much welcome.
This is due to the fact that we also consider +M effect . In fluorine it’s 2p orbital that participated in overlapping but in chlorine it’s 3 p orbital. 3p of chlorine does not overlap efficiently with 2p of benzene carbon so +m decreases in chlorine thus acidic nature increases