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Saturday, 31 October

JEE Main · Chemistry · The p-Block Elements

Preparation of Dinitrogen

JEE Main asked Preparation of Dinitrogen 4 times in 4 of the 108 shifts Lumi analysed, in 2020 and 2022. It belongs to Group 15 & 16, in The p-Block Elements (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
4
in 4 shifts
Years
2 of 8
First asked
2020
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020 and 2022. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200’210.10’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 3 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
  • 20223 of 24
  • 20210 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.

  • Match list on reactions and gas evolved
  • Identify compound not giving dinitrogen on heating

Difficulty

Easy 2Medium 2Hard 0

Every question was multiple choice.

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. 28 Jun 2022, Shift 1 · Q66Nitrogen gas is obtained by thermal decomposition ofEasySingle correct
  2. 27 Jun 2022, Shift 2 · Q66The gas produced by treating an aqueous solution of ammonium chloride with sodium nitrite isEasySingle correct
  3. 28 Jul 2022, Shift 1 · Q69Match List - I with List - II, match the gas evolved during each reaction. List - I | List - II (A)…MediumMatch the list
  4. 2 Sep 2020, Shift 1 · Q35On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2\mathrm{H_2} in the presence of a…MediumSingle correct

Shifts: 2 Sep 2020, Shift 1, 27 Jun 2022, Shift 2, 28 Jun 2022, Shift 1, 28 Jul 2022, Shift 1.

Same topic

Other ideas in Group 15 & 16

Group 15 & 16 has 15 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas