The order of reactivity of the following alkyl halides for an SN2 reaction is
RF > RCl > RBr >RI
RCl > RBr > RF > RI
RF > RBr > RCl > RI
RI > RBr > RCl > RF
I⊖ is a better nucleophile and a better leaving group
The order of reactivity of haloalkenes is RI>RCl>RBr
Why