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Saturday, 31 October

JEE Main · Chemistry · Structure of Atom

Ionization and Excitation Energy

JEE Main asked Ionization and Excitation Energy 6 times in 6 of the 108 shifts Lumi analysed, in 2021, 2022, 2023, 2024 and 2026. It belongs to Bohr's Atomic Theory, in Structure of Atom (Chemistry). The longest wait between two years asking it was 2 years. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
5 of 8
First asked
2021
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2023, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.03’210.07’220.07’230.05’240’250.11’26

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

Shift by shift

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

  • 20261 of 9
  • 20250 of 8
  • 20241 of 18
  • 20231 of 12
  • 20222 of 24
  • 20211 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: calculation.

  • Ionization energy of hydrogen-like ion
  • Ionization energy from wavelength

Difficulty

Easy 1Medium 5Hard 0

5 of the 6 questions had a numerical answer.

Every question

All 6 questions

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

  1. 2 Apr 2026, Shift 1 · Q52What is the energy (in J atom−1\mathrm{J\ atom^{-1}}) required for the following process ? Li2+(g)→Li3+(g)+e−\mathrm{Li^{2+}(g)\rightarrow Li^{3+}(g)+e^-} (Take…EasySingle correct
  2. 31 Jan 2024, Shift 1 · Q82The ionization energy of sodium in kJ mol−1^{-1}, if electromagnetic radiation of wavelength 242 nm is just sufficient to ionize sodium…MediumNumerical value
  3. 10 Apr 2023, Shift 2 · Q81The electron in the nthn^{th} orbit of Li2+\mathrm{Li^{2+}} is excited to (n+1)(n + 1) orbit using the radiation of energy…MediumNumerical valueHas a figure
  4. 25 Jun 2022, Shift 1 · Q83The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x×10−8x \times 10^{-8} m. The…MediumNumerical value
  5. 28 Jul 2022, Shift 2 · Q53If the wavelength for an electron emitted from H-atom is 3.3×10−103.3\times10^{-10} m, then energy absorbed by the electron in its ground state…MediumNumerical value
  6. 25 Feb 2021, Shift 2 · Q53Electromagnetic radiation of wavelength 663 nm is just sufficient to ionise the atom of metal A. The ionization energy of metal A in kJ…MediumNumerical value

Shifts: 25 Feb 2021, Shift 2, 25 Jun 2022, Shift 1, 28 Jul 2022, Shift 2, 10 Apr 2023, Shift 2, 31 Jan 2024, Shift 1, 2 Apr 2026, 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