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Saturday, 31 October

JEE Main · Chemistry · Hydrogen

Isotopes of Hydrogen

JEE Main asked Isotopes of Hydrogen 5 times in 5 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2023. It belongs to Hydrogen and Hydrides, in Hydrogen (Chemistry). The longest wait between two years asking it was 1 year. In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
4 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, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200.07’210.03’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 1 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
  • 20221 of 24
  • 20212 of 24
  • 20201 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: recall.

  • Incorrect statement selection on hydrogen
  • Assertion-reason on hydrogen isotopes

Difficulty

Easy 4Medium 1Hard 0

Every question was multiple choice.

Every question

All 5 questions

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

  1. 10 Apr 2023, Shift 2 · Q66Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Physical properties of…EasyAssertion–reason
  2. 28 Jun 2022, Shift 2 · Q68Hydrogen has three isotopes : protium (1^1H) , deuterium (2^2H or D) and tritium (3^3H or T) . They have nearly same chemical…EasySingle correct
  3. 27 Aug 2021, Shift 1 · Q37Deuterium resembles hydrogen in properties but :EasySingle correct
  4. 3 Aug 2021, Shift 2 · Q35Which one of the following statements is incorrect? A. The correct order of increasing first ionization enthalpy is Li < H < F. B. Out of…MediumOther
  5. 8 Jan 2020, Shift 2 · Q34Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x)(x), (y)(y) and (z)(z),…EasySingle correct

Shifts: 8 Jan 2020, Shift 2, 3 Aug 2021, Shift 2, 27 Aug 2021, Shift 1, 28 Jun 2022, Shift 2, 10 Apr 2023, Shift 2.

Same topic

Other ideas in Hydrogen and Hydrides

Hydrogen and Hydrides has 29 ideas JEE Main has asked; 21 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas