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Saturday, 31 October

JEE Main · Chemistry · The s-Block Elements

Formation of Oxides, Peroxides, and Superoxides

JEE Main asked Formation of Oxides, Peroxides, and Superoxides 5 times in 5 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2023. It belongs to The s-Block Elements (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
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.

00.10.20’170.08’200.03’210.03’220.14’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 2 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
  • 20232 of 12
  • 20221 of 24
  • 20211 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.

  • Statement pair on superoxides of li and mg
  • Identify compound that does not exist

Difficulty

Easy 2Medium 3Hard 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 1 · Q67The compound which does not exist isMediumSingle correct
  2. 8 Apr 2023, Shift 1 · Q68Given below are two statements: Statement I: Lithium and Magnesium do not form superoxide Statement II: The ionic radius of…MediumTwo statements
  3. 30 Jun 2022, Shift 1 · Q69Correct statement about alkali metal oxides isEasySingle correct
  4. 4 Aug 2021, Shift 1 · Q38Choose the correct statement from the following :MediumSingle correct
  5. 4 Sep 2020, Shift 1 · Q34On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are :EasySingle correct

Shifts: 4 Sep 2020, Shift 1, 4 Aug 2021, Shift 1, 30 Jun 2022, Shift 1, 8 Apr 2023, Shift 1, 10 Apr 2023, Shift 1.

Same topic

Other ideas in s-Block Elements

s-Block Elements has 27 ideas JEE Main has asked; 20 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas