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  4. Why is F2 the strongest oxidizing agent (among halogens) although electron affinity of Cl2 is higher than F2 ?

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Q. Why is $ F_2 $ the strongest oxidizing agent (among halogens) although electron affinity of $ Cl_2 $ is higher than $ F_2 $ ?

J & K CETJ & K CET 2017The p-Block Elements - Part2

Solution:

$F_{2}$ is strongest oxidising agent due to its low enthalpy of dissociation as $F—F$ bond is weak and high enthalpy of hydration of small $F^{-}$ ion