Learn

Saturday, 31 October

JEE Main · Chemistry · The d- and f-Block Elements

Spin-only Magnetism

JEE Main asked Spin-only Magnetism 23 times in 21 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2024, 2025 and 2026. It belongs to d-Block Elements, in The d- and f-Block Elements (Chemistry). The longest wait between two years asking it was 2 years. In 2021, 2022, 2024, 2025 and 2026 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
23
in 21 shifts
Years
6 of 8
First asked
2020
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022, 2024, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.20.40’170.08’200.14’210.21’220’230.37’240.25’250.22’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 4 in 24 shifts · 2022: 6 in 24 shifts · 2023: 0 in 12 shifts · 2024: 8 in 18 shifts · 2025: 2 in 8 shifts · 2026: 2 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20262 of 9
  • 20252 of 8
  • 2024226 of 18
  • 20230 of 12
  • 20226 of 24
  • 20214 of 24
  • 20201 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: multi-step.

  • Count paramagnetic ions
  • Statement i/ii on magnetic behaviour

Difficulty

Easy 6Medium 16Hard 1

12 of the 23 questions had a numerical answer.

Every question

All 23 questions

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

  1. 4 Apr 2026, Shift 2 · Q62Consider ∣x∣|x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with ∣x∣|x|…MediumOther
  2. 2 Apr 2026, Shift 2 · Q74Number of paramagnetic ions among the following d- and f-block metal ions is __________.…MediumNumerical value
  3. 8 Apr 2025, Shift 2 · Q58The correct decreasing order of spin only magnetic moment values (BM) of Cu+\mathrm{Cu^+}, Cu2+\mathrm{Cu^{2+}}, Cr2+\mathrm{Cr^{2+}} and…EasySingle correct
  4. 3 Apr 2025, Shift 1 · Q62The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are : A. Cr2+\mathrm{Cr^{2+}} B. Fe2+\mathrm{Fe^{2+}} C.…EasyOther
  5. 27 Jan 2024, Shift 1 · Q67Which of the following electronic configuration would be associated with the highest magnetic moment ?EasySingle correct
  6. 8 Apr 2024, Shift 1 · Q86The 'spin only' magnetic moment value of MO42−\mathrm{MO_4^{2-}} is ____________ BM. (Where M is a metal having least metallic radii. among…MediumNumerical value
  7. 6 Apr 2024, Shift 2 · Q86Among VO2+\mathrm{VO_2^+}, MnO4−\mathrm{MnO_4^-} and Cr2O72−\mathrm{Cr_2O_7^{2-}}, the spin-only magnetic moment value of the species with least…MediumNumerical value
  8. 6 Apr 2024, Shift 1 · Q86Among CrO, Cr2O3\mathrm{Cr_2O_3} and CrO3\mathrm{CrO_3}, the sum of spin-only magnetic moment values of basic and amphoteric oxides is ________…MediumNumerical value
  9. 6 Apr 2024, Shift 1 · Q87The difference in the 'spin-only' magnetic moment values of KMnO4\mathrm{KMnO_4} and the manganese product formed during titration of…MediumNumerical value
  10. 5 Apr 2024, Shift 1 · Q86The spin-only magnetic moment value of the ion among Ti2+\mathrm{Ti^{2+}}, V2+\mathrm{V^{2+}}, Co3+\mathrm{Co^{3+}} and Cr2+\mathrm{Cr^{2+}},…MediumNumerical value
  11. 5 Apr 2024, Shift 1 · Q87In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, resulted in green colour…HardNumerical valueHas a figure
  12. 4 Apr 2024, Shift 2 · Q69A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of 3.86 BM. The atomic number of the metal isEasySingle correct
  13. 27 Jun 2022, Shift 1 · Q88Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the mangenese product formed from the…MediumNumerical value
  14. 26 Jun 2022, Shift 1 · Q86The spin-only magnetic moment value of the most basic oxide of vanadium among V2O3\mathrm{V_2O_3}, V2O4\mathrm{V_2O_4} and V2O5\mathrm{V_2O_5}…MediumNumerical value
  15. 25 Jun 2022, Shift 2 · Q71The metal ion (in gaseous state) with lowest spin-only magnetic moment value isMediumSingle correct
  16. 27 Jul 2022, Shift 1 · Q62Given below are two statements. Statement I: O2\mathrm{O_2}, Cu2+\mathrm{Cu^{2+}}, and Fe3+\mathrm{Fe^{3+}} are weakly attracted by magnetic…EasyTwo statements
  17. 26 Jul 2022, Shift 2 · Q87The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF4\mathrm{MnF_4}, MnF3\mathrm{MnF_3} and…MediumNumerical value
  18. 25 Jul 2022, Shift 2 · Q87The spin-only magnetic moment value of M3+\mathrm{M^{3+}} ion (in gaseous state) from the pairs Cr3+/Cr2+\mathrm{Cr^{3+}/Cr^{2+}},…MediumNumerical value
  19. 18 Mar 2021, Shift 2 · Q39The oxide that shows magnetic property is :MediumSingle correct
  20. 17 Mar 2021, Shift 1 · Q38What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous solution ?EasySingle correct
  21. 22 Jul 2021, Shift 2 · Q40The set having ions which are coloured and paramagnetic both is :MediumSingle correct
  22. 25 Feb 2021, Shift 2 · Q59The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ________ BM.MediumNumerical value
  23. 3 Sep 2020, Shift 2 · Q35The incorrect statement is :MediumSingle correct

Shifts: 3 Sep 2020, Shift 2, 25 Feb 2021, Shift 2, 17 Mar 2021, Shift 1, 18 Mar 2021, Shift 2, 22 Jul 2021, Shift 2, 25 Jun 2022, Shift 2, 26 Jun 2022, Shift 1, 27 Jun 2022, Shift 1, 25 Jul 2022, Shift 2, 26 Jul 2022, Shift 2, 27 Jul 2022, Shift 1, 27 Jan 2024, Shift 1, 4 Apr 2024, Shift 2, 5 Apr 2024, Shift 1, 6 Apr 2024, Shift 2, 6 Apr 2024, Shift 1, 8 Apr 2024, Shift 1, 3 Apr 2025, Shift 1, 8 Apr 2025, Shift 2, 2 Apr 2026, Shift 2, 4 Apr 2026, Shift 2.

Same topic

Other ideas in d-Block Elements

d-Block Elements has 31 ideas JEE Main has asked; 21 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas