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JEE Main 20264 AprilMorning Shift
Exam
JEE Main
Year
2026
Date
4 April
Shift
Morning Shift
Subject
Chemistry
Chapter
General Organic Chemistry

JEE Main 2026 · 4 April · Morning Shift · Chemistry · General Organic Chemistry

Increasing order of electron withdrawing power of following...

Increasing order of electron withdrawing power of following functional groups is:
a. −CN-CN
b. −COOH-COOH
c. −NO2-NO_2
d. −I-I

Options

  1. Ac<b<d<ac < b < d < a
  2. Bc<a<b<dc < a < b < d
  3. Cd<b<a<cd < b < a < c
  4. Da<b<c<da < b < c < d

Correct answer

C. d<b<a<cd < b < a < c

Step-by-step solution

The electron withdrawing power (−I-I effect) of various functional groups follows the standard experimental order:

−NO2>−CN>−COOH>−F>−Cl>−Br>−I-NO_2 > -CN > -COOH > -F > -Cl > -Br > -I

Based on this series, the increasing order of electron withdrawing power for the given groups is:

−I<−COOH<−CN<−NO2-I < -COOH < -CN < -NO_2

This corresponds to the sequence d<b<a<cd < b < a < c.

Answer: d<b<a<cd < b < a < c
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