Among the reactions,
`F_(2(g)) + 2e^(-) to 2F_((g))^(-)` and
`Cl_(2(g)) + 2e^(-) to 2Cl_((g))^(-)` which is more feasible ? Give the reason. 

Explanation

Among the given reactions ,
`F_(2(g))+2e^(-)to2F_((g))^(-)` is more feasible.
Formation of halide from halogen involves bond dissociation enthalpy and electron gain enthalpy. Electron gain enthalpy is more for chlorine and its bond dissociation energy is also more . Hence ,it is relatively difficult to form chloride.