$+\mathrm{Cl}_2 \xrightarrow[4]{\mathrm{FeCl}_3} X \xrightarrow[\text { Na/dry ether…
$+\mathrm{Cl}_2 \xrightarrow[4]{\mathrm{FeCl}_3} X \xrightarrow[\text { Na/dry ether }]{\mathrm{R}-\mathrm{X}} \mathrm{Y}$
Conversion of X to Y is an example of
Wurtz reaction
Fittig reaction
Wurtz-Fittig reaction
Friedel-Crafts reaction
Solution
$\mathrm{FeCl}_3+\mathrm{Cl}_2 \longrightarrow \mathrm{FeCl}_4^{-}+\mathrm{Cl}^{+}$
The reaction of Aryl halide and Alkyl halide in presence of sodium metal and dry ether is Wurtz-Fittig reaction.