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PYQs/Chemistry/Nucleophilic Substitution Reactions

Chemistry2015easy

Nucleophilic Substitution Reactions

In an $S_N1$ reaction on chiral centres, there is:

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Nucleophilic Substitution Reactions

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). $\\$ Assertion (A) : $\c{-CH_2-CH_2-CH_2-CH_2-I}\text{ undergoes } \mathrm{S_N2} \text{ reaction faster than } \ \c{-CH_2-CH_2-CH_2-CH_2-CI}.$ $\\$ Reason (R) : Iodine is a better leaving group because of its large size. $\\$ In the light of the above statements, choose the correct answer from the options given below:

The compound that will undergo $S_{N}1$ reaction with the fastest rate is

Consider the reaction $CH_3$ - $CH_2$ - $CH_2$ -Br + NaCN → $CH_3$ – $CH_2$ – $CH_2$ –CN + NaBr The reaction will be the fastest in

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