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Friday, 9 October

JEE Main 2026 · ChemistryMultiple choiceTwo statementsMediumConceptual

JEE Main 2 April 2026, Shift 1, Chemistry Q53

Question 53 of 75 in this shift, Chemistry question 3 of 25, Section A.

Given below are two statements : Statement (I) : The correct sequence of bond lengths in the following species is : O2+<O2<O2−<O22−\mathrm{O_2^+<O_2<O_2^-<O_2^{2-}} Statement (II) : The correct sequence of number of unpaired electrons in the following species is : O2>O2+>O2−>O22−\mathrm{O_2>O_2^+>O_2^->O_2^{2-}} In the light of the above statements, choose the correct answer from the options given below :
  1. (1)Both Statement I and Statement II are true
  2. (2)Both Statement I and Statement II are false
  3. (3)Statement I is true but Statement II is falseOfficial answer
  4. (4)Statement I is false but Statement II is true

Official answer

Option 3

NTA final key.

Chapter
Chemical Bonding and Molecular Structure
Topic
Molecular Orbital Theory
Idea tested
Oxygen Ion Series Comparison

Same topic in other shifts

All Molecular Orbital Theory questions
  1. 4 Apr 2026, Shift 2 · Q53Which of the following pictorial diagram most correctly represents the π∗\pi^* (π\pi-antibonding) molecular orbital between two atoms if…MediumDiagram basedHas a figure
  2. 9 Apr 2024, Shift 1 · Q82The total number of species from the following in which one unpaired electron is present, is ________.…MediumNumerical value
  3. 9 Apr 2024, Shift 2 · Q82Total number of electrons present in (π∗)(\pi^*) molecular orbitals of O2\mathrm{O_2}, O2+\mathrm{O_2^{+}} and O2−\mathrm{O_2^{-}} is ________.EasyNumerical value
  4. 29 Jan 2024, Shift 1 · Q82The number of species from the following which are paramagnetic and with bond order equal to one is ________.…MediumNumerical value
  5. 31 Jan 2024, Shift 1 · Q61The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same…EasyOther
  6. 25 Jul 2022, Shift 1 · Q81Among the following species N2, N2+, N2−, N22−, O2, O2+, O2−, O22−\mathrm{N_2,\ N_2^{+},\ N_2^{-},\ N_2^{2-},\ O_2,\ O_2^{+},\ O_2^{-},\ O_2^{2-}} the number of species…MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.