Question:
The correct order of bond dissociation enthalpy of halogens is :
Correct Option: , 3
Solution:
Correct order of bond dissociation enthalpy of halogens is $\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{F}_{2}>\mathrm{I}_{2}$.
Due to inter electronic repulsions $\mathrm{F}-\mathrm{F}$ bond becomes weak and easily broken.
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