Verified Solution • 2025–26 Session moderate

QJEEM19Ch2a04: JEE Main 2019 Chemistry - Class 12 JEEM19Ch2a04 Solution: Increasing rate of S N 1 reaction in the following compounds is :

Increasing rate of SN1 reaction in the following compounds is : JEE Main 2019 (Online) 10th April Morning Slot Chemistry - Haloalkanes and Haloarenes Question 123 English

Multiple Choice Options

  • A (B) < (A) < (D) < (C)
  • B (A) < (B) < (C) < (D)
  • C (A) < (B) < (D) < (C)
  • D (B) < (A) < (C) < (D)

Step-by-Step Verified Solution

The rate of SN1 is decided by the stability of carbocation which is formed when leaving group I(Iodine) leave from the compound. JEE Main 2019 (Online) 10th April Morning Slot Chemistry - Haloalkanes and Haloarenes Question 123 English Explanation

Carbocation (D) is most stable due to +R effect of CH3O group.

Carbocation (C) is stabilised by +I and +H effect of CH3 group.

Carbocation (B) is least stable due to –I effect of MeO group.

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