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JEE Main 20199 AprilEvening Shift
Exam
JEE Main
Year
2019
Date
9 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Haloalkanes and Haloarenes

JEE Main 2019 · 9 April · Evening Shift · Chemistry · Haloalkanes and Haloarenes

Increasing order of reactivity of the following compounds for S _ N...

Increasing order of reactivity of the following compounds for SN1{S}_{N}1 substitution is:
Increasing order of reactivity of the following compounds for S _ N 1 substitution is:

Options

  1. AB<C<D<AB < C < D < A
  2. BB<A<D<CB < A < D < C
  3. CA<B<D<CA < B < D < C
  4. DB<C<A<DB < C < A < D

Correct answer

B. B<A<D<CB < A < D < C

Step-by-step solution

SN1{\text{SN}}_{1} reactivity order ∝∝ stability of carbocation
Increasing order of reactivity of the following compounds for S _ N 1 substitution is:

SN1 is unimolecular because the slow step of the reaction involves only the substrate, the reaction is unimolecular. Because only the substrate is present in the transition state, the rate of the reaction depends only on its concentration and not on the concentration of the nucleophile.

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