The order of reactivity of the given haloalkanes towards nucleophile is

R C l > R B r > R I

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R B r > R I > R C l

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R B r > R C l > R I

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R I > R B r > R C l

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Solution

The correct option is D $R I > R B r > R C l$
The reactivity of the given haloalkanes towards nucleophile depend on leaving group ability of halogens. the leaving group ability of halogens are in the order $I^{-} > B r^{-} > C l^{-} > F^{-}$ . Hence, The correct order of reactivity of the given haloalkanes towards nucleophile is $R I > R B r > R C l .$

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explane as to why haloarenes are much lass reactive than the haloalkanes towards nucleophilic substitution reaction?

Consider the following haloalkanes:

$1. C H_{3} F 2. C H_{3} C l 3. C H_{3} B r 4. C H_{3} I$

The increasing order of reactivity in nucleophilic substitution reaction is:

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