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Saturday, 31 October

JEE Main · Chemistry · Chemical Bonding and Molecular Structure

Bond Order Calculation

JEE Main asked Bond Order Calculation 11 times in 11 of the 108 shifts Lumi analysed, in 2021, 2022 and 2024. It belongs to Molecular Orbital Theory, in Chemical Bonding and Molecular Structure (Chemistry). The longest wait between two years asking it was 2 years. In 2021, 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
11
in 11 shifts
Years
3 of 8
First asked
2021
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.14’210.17’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 4 in 24 shifts · 2022: 5 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 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.

  • 20260 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 of 12
  • 20225 of 24
  • 20214 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: application.

  • Count species by magnetism and bond order
  • Total electrons from bond order

Difficulty

Easy 2Medium 9Hard 0

6 of the 11 questions had a numerical answer.

Every question

All 11 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 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
  2. 8 Apr 2024, Shift 2 · Q83Number of molecules having bond order 2 from the following molecules is ________. C2\mathrm{C_2}, O2\mathrm{O_2}, Be2\mathrm{Be_2},…MediumNumerical value
  3. 25 Jun 2022, Shift 1 · Q61Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron ? (A)…MediumOther
  4. 24 Jun 2022, Shift 2 · Q63The correct order of bond orders of C22−_2^{2-}, N22−_2^{2-} and O22−_2^{2-} is, respectivelyMediumSingle correct
  5. 30 Jul 2022, Shift 2 · Q52On the basis of MO. theory, the number of molecules from the following which have bond order two, is ________. O2\mathrm{O_2},…MediumNumerical value
  6. 27 Jul 2022, Shift 2 · Q62Match **List - I** with **List - II**. List - I (A) ψMO=ψA−ψB\psi_{MO}=\psi_A-\psi_B (B) μ=Q×r\mu=Q\times r (C) Nb−Na2\frac{N_b-N_a}{2} (D)…EasyMatch the list
  7. 27 Jul 2022, Shift 1 · Q85According to MO theory, number of species/ions from the following having identical bond order is__.…MediumNumerical value
  8. 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
  9. 26 Feb 2021, Shift 2 · Q31Match List-I with List-II. List-I (Molecule) | List-II (Bond order) (a) Ne2\mathrm{Ne_2} | (i) 1 (b) N2\mathrm{N_2} | (ii) 2 (c)…MediumMatch the list
  10. 25 Feb 2021, Shift 1 · Q32According to molecular orbital theory, the species among the following that does not exist is :MediumSingle correct
  11. 4 Aug 2021, Shift 2 · Q54The bond order in NO+\mathrm{NO^+} is ________ . ( integer answer)EasyNumerical value

Shifts: 25 Feb 2021, Shift 1, 26 Feb 2021, Shift 2, 18 Mar 2021, Shift 1, 4 Aug 2021, Shift 2, 24 Jun 2022, Shift 2, 25 Jun 2022, Shift 1, 27 Jul 2022, Shift 2, 27 Jul 2022, Shift 1, 30 Jul 2022, Shift 2, 29 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.

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