The correct order of reactivity of CH 3 Br in methanol with the following nucleophiles is F - , I - , C 2 H 5 O - and C 6 H 5 O -

I - C 2 H 5 O - C 6 H 5 O - F -

I - C 6 H 5 O - F - C 2 H 5 O -

I - C 2 H 5 O - F - C 6 H 5 O -

I - F - C 6 H 5 O - C 2 H 5 O -

Chemistry · Alkyl and Aryl Halides

JEE Main 2026 — 22 January, Morning Shift — Question 57

The correct order of reactivity of $\mathrm{CH}_{3} \mathrm{Br}$ in methanol with the following nucleophiles is $\mathrm{F}^{-}, \mathrm{I}^{-}, \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}$ and $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}^{-}$

Option A:
$\mathrm{I}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}^{-}>\mathrm{F}^{-}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}$
Option B:
$\mathrm{I}^{-}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}^{-}>\mathrm{F}^{-}$
Correct
Option C:
$\mathrm{I}^{-}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}>\mathrm{F}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}^{-}$
Option D:
$\mathrm{I}^{-}>\mathrm{F}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{O}^{-}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}$

Answer: B

Step-by-step solution

Order of nucleophilicity : $\mathrm{I}^{\ominus}>\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{\ominus}>\mathrm{PhO}^{\ominus}>\mathrm{F}^{\ominus}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2026
Paper: 22 January, Morning Shift
Subject: Chemistry
Chapter: Alkyl and Aryl Halides
Topic: Mechanism of Substitution reactions