JEE Main · Chemistry · Chemical Bonding and Molecular Structure
LCAO and MO Formation
JEE Main asked LCAO and MO Formation 3 times in 3 of the 108 shifts Lumi analysed, all in 2024. It belongs to Molecular Orbital Theory, in Chemical Bonding and Molecular Structure (Chemistry). In 2024 it came in more than one shift of the same year.
Updated 2026-10-24
- Times asked
- 3
- in 3 shifts
- Years
- 1 of 8
- First asked
- 2024
- the only year
- Pattern
- New since 2024
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.
Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 3 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.
Shift by shift
Each square is one analysed shift, in date order. Open a filled one for that paper.
How JEE Main framed it
Numerical value is the usual form. Skill tested: recall.
- True statement selection on lcao conditions
- Number of molecular orbitals formed
Difficulty
1 of the 3 questions had a numerical answer.
Every question
All 3 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 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
- 30 Jan 2024, Shift 1 · Q82The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is ________.EasyNumerical value
- 8 Apr 2024, Shift 2 · Q61When and are the wave functions of atomic orbitals, then is represented by :EasySingle correct
Shifts: 30 Jan 2024, Shift 1, 31 Jan 2024, Shift 1, 8 Apr 2024, Shift 2.
Same topic
Other ideas in Molecular Orbital Theory
Molecular Orbital Theory has 11 ideas JEE Main has asked; 4 of them came up in more than one question.
- Bond Order Calculation11× · 2024
- Magnetic Property Prediction9× · 2024
- Oxygen Ion Series Comparison4× · 2026
- Nodal Planes in Molecular Orbitalsonce · 2026
- Counting Antibonding Electronsonce · 2024
- Isoelectronic Bond Order Shortcutonce · 2024
- Symmetry of Pi Molecular Orbitalsonce · 2024
- Isoelectronic Species Principle in MOTonce · 2023
- LUMO as Pi-Acceptoronce · 2022
- Bond Stability Comparisononce · 2020