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Saturday, 31 October

JEE Main · Physics · Nuclei

Counting Alpha and Beta Emissions

JEE Main asked Counting Alpha and Beta Emissions 3 times in 3 of the 108 shifts Lumi analysed, in 2021 and 2022. It belongs to Radioactive Decay, in Nuclei (Physics). The longest wait between two years asking it was 1 year. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
2 of 8
First asked
2021
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.03’210.07’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 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
  • 20230 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

Single correct is the usual form. Skill tested: application.

  • Mass and atomic number after decay chain
  • Number of alpha and beta emissions in decay chain

Difficulty

Easy 3Medium 0Hard 0

Every question was multiple choice.

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. 29 Jun 2022, Shift 2 · Q35In the following nuclear reaction,…EasySingle correct
  2. 26 Jun 2022, Shift 1 · Q48How many alpha and beta particles are emitted when Uranium 92U238_{92}\mathrm{U}^{238} decays to lead 82Pb206_{82}\mathrm{Pb}^{206} ?EasySingle correct
  3. 4 Aug 2021, Shift 1 · Q4A hypothetical radioactive nuclei decays according to the following series…EasySingle correct

Shifts: 4 Aug 2021, Shift 1, 26 Jun 2022, Shift 1, 29 Jun 2022, Shift 2.

Same topic

Other ideas in Radioactive Decay

Radioactive Decay has 12 ideas JEE Main has asked; 9 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas