Answer:
Bond length of \[F-F\] bond (143 pm)
is less than that of \[\text{C}l\,\text{-}\,\text{C}l\] bond (199 pm).
Therefore, bond dissociation enthalpy or bond energy of \[{{F}_{2}}\] is
expected to be more than that of \[\text{C}{{l}_{2}}\]. But actually it is
less. This is an account of greater force of repulsion in the non-bonded (lone)
electron pairs in the molecule of \[{{F}_{2\,}}\,(:\underset{.\,\,\,\,.}{\overset{.\,\,\,\,.}{\mathop{F}}}\,:\underset{.\,\,\,.}{\overset{.\,\,\,.}{\mathop{F}}}\,:)\]
than in \[C{{l}_{2}}\] as a result of which the bond cleavage is easier.
You need to login to perform this action.
You will be redirected in
3 sec