Q.

The order of reactivities of the following alkyl halides for a SN2 reaction is

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a

RF > RCl > RBr > RI

b

RF > RBr > RCl > RI

c

RCl > RBr > RF > RI

d

RI > RBr > RCl > RF

answer is D.

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Detailed Solution

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More good the leaving group more will be reactivity of alkyl halide in SN2​ since  order of leaving group is I>Br>Cl>F

So, order of reactivity of alkyl halide in Sn2 reaction is RI>RBr>RCl>RF

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The order of reactivities of the following alkyl halides for a SN2 reaction is