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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties1 Mark
Question
Why is $\mathrm{F}_2$ more reactive than $\mathrm{Cl}_2$ ?
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Answer

It is because $\mathrm{F}_2$ has lower bond dissociation enthalpy than $\mathrm{Cl}_2$ due to repulsion between valence electrons due to exceptionally small size of fluorine.

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