The pairs among A = [ SO 3 2- , CO 3 2- ], B = [ O 2 2- , F 2 ], C = [ CN - , CO ] , D = [ NH 3 , H 3 O + ] and E = [ MnO 4 2- , CrO 4 2- ] that do not have similar Lewis dot structure are :

Chemistry · Chemical Bonding

JEE Main 2026 — 6 April, Morning Shift — Question 49

The pairs among $\mathrm{A}=\left[\mathrm{SO}_{3}{ }^{2-}, \mathrm{CO}_{3}{ }^{2-}\right], \mathrm{B}=\left[\mathrm{O}_{2}{ }^{2-}, \mathrm{F}_{2}\right], \mathrm{C}=\left[\mathrm{CN}^{-}, \mathrm{CO}\right]$ , $\mathrm{D}=\left[\mathrm{NH}_{3}, \mathrm{H}_{3} \mathrm{O}^{+}\right]$ and $\mathrm{E}=\left[\mathrm{MnO}_{4}{ }^{2-}, \mathrm{CrO}_{4}{ }^{2-}\right]$ that do not have similar Lewis dot structure are :

Option A:
A, B and E
Option B:
A and E
Correct
Option C:
B, C and D
Option D:
C and D

Answer: B

Step-by-step solution

A and E do not have similar Lewis structure does not have unpaired e. In $\mathrm{B}, \mathrm{C}, \mathrm{D}$ pair of species haved same no of e . They have similar Lewis dot structure.

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Exam: JEE Main 2026
Paper: 6 April, Morning Shift
Subject: Chemistry
Chapter: Chemical Bonding
Topic: Introduction to Bonding and Lewis Octet Theory