Q12 / 75 · JEE Main 2020 (02 Sep Shift 2) · Chemistry

Consider the reaction sequence given below :
Which of the following statements is true:

A
Changing the base from ${OH}^{⊖}$ to ${}^{⊖}{OR}$ will have no effect on reaction $(2)$
Correct answer
B
Changing the concentration of base will have no effect on reaction $(1)$
C
Doubling the concentration of base will double the rate of both the reactions
D
Changing the concentration of base will have no effect on reaction $(2)$

Solution

First reaction is ${SN}^{1}$ in which rate does not depend on conc. of nucleophile.

Second reaction is $E 2$ reaction in which rate depends on conc. of base.

Hence, the correct answer is option: 'B'.