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Friday, 9 October

JEE Main Chemistry · Chemical Bonding and Molecular Structure

Molecular Orbital Theory in JEE Main

Molecular Orbital Theory (Chemistry, Chemical Bonding and Molecular Structure) came 10 times in 10 of the 42 JEE Main shifts Lumi analysed, across 6 distinct ideas. 6 of them came in 2024–26; it was last asked in 2026.

Questions
10
in 10 shifts
Ideas asked
6
2 asked more than once
Numerical answer
6
60% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0241’170’201’212’220’234’240’252’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 3Medium 7Hard 0

Format

  • Numerical value6 Q
  • Two statements1 Q
  • Diagram based1 Q
  • Other1 Q
  • Single correct1 Q
Ideas inside the topic
6 ideas
Where it sits

Part of Chemical Bonding and Molecular Structure, which had 47 questions in all. Molecular Orbital Theory accounts for 21% of them. In Lumi's JEE taxonomy it belongs to Inorganic Chemistry.

Every question

All 10 Molecular Orbital Theory questions

Newest first, each with its options and official answer.

  1. 2 Apr 2026, Shift 1 · Q53Given below are two statements : Statement (I) : The correct sequence of bond lengths in the following species is :…MediumTwo statements
  2. 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
  3. 9 Apr 2024, Shift 1 · Q82The total number of species from the following in which one unpaired electron is present, is ________.…MediumNumerical value
  4. 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
  5. 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
  6. 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
  7. 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
  8. 28 Jul 2022, Shift 1 · Q83The number of paramagnetic species among the following is __________.…MediumNumerical value
  9. 18 Mar 2021, Shift 1 · Q52AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory, the bond…MediumNumerical value
  10. 2 Apr 2017 (offline) · Q42Which of the following species is **not** paramagnetic ?EasySingle correct