Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 201910 AprilMorning Shift
Exam
JEE Main
Year
2019
Date
10 April
Shift
Morning Shift
Subject
Chemistry
Chapter
Haloalkanes and Haloarenes

JEE Main 2019 · 10 April · Morning Shift · Chemistry · Haloalkanes and Haloarenes

Increasing rate of S _ N 1 reaction in the following compounds is:...

Increasing rate of SN1{S}_{N}1 reaction in the following compounds is:
(I)Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)
(II) Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)
(III)Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)
(IV) Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)

Options

  1. A(I)<(II)<(III)<(IV)( I ) < ( II ) < ( III ) < ( IV )
  2. B(II)<(I)<(III)<(IV)( II ) < ( I ) < ( III ) < ( IV )
  3. C(II)<(I)<(IV)<(III)( II ) < ( I ) < ( IV ) < ( III )
  4. D(I)<(II)<(IV)<(III)( I ) < ( II ) < ( IV ) < ( III )

Correct answer

B. (II)<(I)<(III)<(IV)( II ) < ( I ) < ( III ) < ( IV )

Step-by-step solution

The rate of SN1{S}_{N}1 reaction ∝∝ stability of carbocation
stability of carbocation ∝+ve∝ + ve charge delocation.
∝+M,+HC,+I∝ + M, + HC, + I
Order of effect effectiveness
+M>+HC>+I(+M)>(−I)+ M > + HC > + I ( + M ) > ( - I )
D Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)

C Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)

A Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)

B Increasing rate of S _ N 1 reaction in the following compounds is: (I) (II) (III) (IV)
So, order of stability B<A<C<DB < A < C < D

Practice Haloalkanes and Haloarenes on Quantrex Academy →

More from Haloalkanes and Haloarenes

n-Butane on monochlorination under photochemical condition gives an optically active… JEE Main 2026Given below are two statements: Statement I: Due to increase in van der Waals forces, the… JEE Main 2026RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm^3/g at STP.… JEE Main 2026Benzyl isocyanide can be obtained from Choose the correct answer from the options given… JEE Main 2026Match the LIST-I with LIST-II List-I (Reaction) List-II (Mechanism) A. Williamson… JEE Main 2026Match the LIST-I with LIST-II List-I Name of reaction List-II Reagent or catalyst used A.… JEE Main 2026Correct statements regarding alkyl halides (R - X) among the following are: A. Alcohol… JEE Main 2026Given below are two statements : Statement (I) : Benzyl chloride reacts faster in S_N1… JEE Main 2026 Full Haloalkanes and Haloarenes list All JEE Main PYQs