The relative reactivity of(I) Benzyl chloride | vedclass

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(B) The reactivity of alkyl halides towards $S_N^1$ reaction is directly proportional to the stability of the intermediate carbocation formed.In the g

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$II > I > III$

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(B) The reactivity of alkyl halides towards $S_N^1$ reaction is directly proportional to the stability of the intermediate carbocation formed.In the given compounds,the carbocations formed are benzyl carbocations.$(II)$ $p$-methoxy benzyl carbocation is most stable due to the strong $+M$ effect of the $-OCH_3$ group.$(I)$ Benzyl carbocation has no substituent.$(III)$ $p$-Nitrobenzyl carbocation is least stable due to the strong $-M$ and $-I$ effects of the $-NO_2$ group,which destabilize the positive charge.Therefore,the order of stability of carbocations and hence the reactivity towards $S_N^1$ is $II > I > III$.

The relative reactivity of
$(I)$ Benzyl chloride
$(II)$ $p$-methoxy benzyl chloride
$(III)$ $p$-Nitrobenzyl chloride
Towards $S_N^1$ reaction follows the order

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The relative reactivity of$(I)$ Benzyl chloride$(II)$ $p$-methoxy benzyl chloride$(III)$ $p$-Nitrobenzyl chlorideTowards $S_N^1$ reaction follows the order