Chemistry - Halogen Derivative Question with Solution | TestHub

Order of reactivity of E is as

Order of nucleophilicity ${\mathrm{F}}^{-}<{\mathrm{Cl}}^{-}<{\mathrm{Br}}^{-}<{\mathrm{I}}^{-}$(In ${\mathrm{H}}_2\mathrm{O}$ )

Order of reactivity of SN² is as : 

Order of reactivity of SN¹ is as :