7.36     Arrange the following in the order of property indicated for each set:

        (i)     F_{2}, CI_{2}, Br_{2}, I_{2}- increasing bond dissociation enthalpy.

Answers (1)

Bond dissociation energy usually decreases as we move down in a group, Bond dissociation energy usually decreases as the atomic size increases. whereas, the bond dissociation energy of F_2 is lower than that of Cl_2and Br_2. This is due to the small atomic size of fluorine. hence,

I_2< F_2<Br_2<Cl_2

 

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