Consider the reaction sequence given below :

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Question:
Consider the reaction sequence given below :

Which of the following statements is true :

Changing the concentration of base will have no effect on reaction (1)
Changing the concentration of base will have no effect on reaction (2)
Changing the base from $\mathrm{OH}^{\ominus}$ to $^{\ominus} \mathrm{OR}$ will have no effect on reaction (2)
Doubling the concentration of base will double the rate of both the reactions.

Correct Option: 1

Solution:

Reaction 1: SN,

Reaction $2: \mathrm{E}_{2}$

$\mathrm{SN}_{1}$ is independent of concentration of nucleophile/base