The order of reactivity of the following alkyl halides for a S_(N)2 re

1.	The order of reactivity of the following alkyl halides for a S_(N)2 reaction is
Answer» `R -F GT R-Cl gt R-Br gt R-I` `R-F gt R-Br gt R-Cl gt R-I` `R-Cl gt R-Br gt R-F gt R-I ` `R-I gt RBR gt R-Cl gt R-F` ANSWER :D

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