JEE Main 2019ChemistryHaloalkanes and HaloarenesMediumMCQ

JEE Main 2019 — Haloalkanes and Haloarenes Question with Solution

JEE Main 2019 (10 Apr Shift 1)

Question

Increasing rate of SN1 reaction in the following compounds is:
(I)
(II)
(III)
(IV)

Choose an option

Show full solutionCorrect option: B
Correct answer
B(II)<(I)< (III)<(IV)

Step-by-step explanation

The rate of SN1 reaction ∝ stability of carbocation
stability of carbocation ∝+ve charge delocation.
∝+M, +HC, +I
Order of effect effectiveness
+M>+HC>+I (+M )> (-I)
D 

C 

A 

B 
So, order of stability B<A<C<D

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Haloalkanes and Haloarenes chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2019, covering the Haloalkanes and Haloarenes chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.