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# Which of the following reactions would not proceed to right hand side?

$\begin{array}{1 1}F_2+Cl^-\rightarrow\\Cl_2+Br^-\rightarrow \\Br_2+I^-\rightarrow\\I_2+Cl^-\rightarrow \end{array}$

Answer : $I_2+Cl^-\rightarrow$
$F_2$ can replace $2Cl^-$ to $Cl_2$,$Cl_2$ can replace $2Br^-$ to $Br_2$ and $Br_2$ can replace $2I^-$ to $I_2$.