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Saturday, 31 October

JEE Main · Chemistry · The Solid State

Edge-Radius Relationships

JEE Main asked Edge-Radius Relationships 4 times in 4 of the 108 shifts Lumi analysed, in 2022 and 2023. It belongs to Crystal Lattices, in The Solid State (Chemistry). The longest wait between two years asking it was 1 year. In 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
2 of 8
First asked
2022
last in 2023
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.150.30’170’200’210.03’220.21’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 3 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
  • 20233 of 12
  • 20221 of 24
  • 20210 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.

  • Atomic radius from unit cell edge
  • Edge length radius relation for cubic cells

Difficulty

Easy 3Medium 1Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 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 · Q61Which of the following expressions is correct in case of a CsCl unit cell (edge length 'a')?EasySingle correct
  2. 13 Apr 2023, Shift 2 · Q82Sodium metal crystallizes in a body centred cubic lattice with unit cell edge length of 4 Å. The radius of sodium atom is ______…EasyNumerical value
  3. 10 Apr 2023, Shift 2 · Q62The correct relationships between unit cell edge length 'a' and radius of sphere 'r' for face-centred and body-centred cubic structures…EasySingle correct
  4. 29 Jul 2022, Shift 1 · Q82Ionic radii of cation A+\mathrm{A^+} and anion B−\mathrm{B^-} are 102 and 181 pm respectively. These ions are allowed to crystallize into…MediumNumerical value

Shifts: 29 Jul 2022, Shift 1, 10 Apr 2023, Shift 2, 13 Apr 2023, Shift 2, 15 Apr 2023, Shift 1.

Same topic

Other ideas in Crystal Lattices

Crystal Lattices has 9 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisAll repeated ideas