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Saturday, 31 October

JEE Main · Chemistry · Structure of Atom

Angular Momentum Quantization

JEE Main asked Angular Momentum Quantization 3 times in 3 of the 108 shifts Lumi analysed, in 2020, 2021 and 2023. It belongs to Bohr's Atomic Theory, in Structure of Atom (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2020
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200.03’210’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20231 of 12
  • 20220 of 24
  • 20211 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: calculation.

  • Statement i/ii on bohr model
  • Kinetic energy of electron in bohr orbit in terms of h and a0

Difficulty

Easy 2Medium 0Hard 1

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.

  1. 15 Apr 2023, Shift 1 · Q62Given below are two statements: Statement I : According to Bohr's model of hydrogen atom, the angular momentum of an electron in a given…EasyTwo statements
  2. 27 Aug 2021, Shift 1 · Q51The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to h2x m a02\frac{h^2}{x\,m\,a_0^2}. The value of 10x10x is…HardNumerical value
  3. 9 Jan 2020, Shift 1 · Q26The de Broglie wavelength of an electron in the 4th4^{\mathrm{th}} Bohr orbit is :EasySingle correct

Shifts: 9 Jan 2020, Shift 1, 27 Aug 2021, Shift 1, 15 Apr 2023, Shift 1.

Same topic

Other ideas in Bohr's Atomic Theory

Bohr's Atomic Theory has 14 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas