$F_{2}$ is highly reactive then $C l_{2}$ .

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Solution

The electron affinity of fluorine is less than chlorine . But florine is more reactive than chlorine due to the following reason .

1) low dissociation energy of $F_{2}$ molecule , and high hydration energy of $F^{-}$ ion’

2) The electronegativity of fluorine is more than that of chlorine .

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F_{2} > C l_{2} > B r_{2} > I_{2}

F_{2}, C l_{2}, B r_{2}, I_{2},

I_{2} < {B r}_{2} < {C l}_{2} < F_{2}

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