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Saturday, 31 October

JEE Main · Chemistry · The s-Block Elements

Flame Coloration

JEE Main asked Flame Coloration 7 times in 7 of the 108 shifts Lumi analysed, in 2021, 2022, 2023 and 2024. It belongs to The s-Block Elements (Chemistry). The longest wait between two years asking it was 1 year. In 2021, 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
4 of 8
First asked
2021
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170’200.07’210.07’220.07’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 2 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
  • 20242 of 18
  • 20231 of 12
  • 20222 of 24
  • 20212 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Match the list is the usual form. Skill tested: recall.

  • Count ions identified by flame test
  • Match list on alkali metals and emission wavelengths

Difficulty

Easy 3Medium 2Hard 2

1 of the 7 questions had a numerical answer.

Every question

All 7 questions

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

  1. 30 Jan 2024, Shift 2 · Q90Number of metal ions characterized by flame test among the following is ________.…MediumNumerical value
  2. 6 Apr 2024, Shift 2 · Q66Match List - I with List - II. List - I (Alkali Metal) (A) Li (B) Na (C) Rb (D) Cs List - II (Emission Wavelength in nm) (I) 589.2 (II)…HardMatch the list
  3. 15 Apr 2023, Shift 1 · Q67Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R : Assertion (A) : BeCl2\mathrm{BeCl_2}…EasyAssertion–reason
  4. 29 Jun 2022, Shift 1 · Q69Match List - I with List - II. List - I (Metal) (A) Li (B) Na (C) Rb (D) Cs List - II (Emitted light wavelength (nm)) (I) 670.8 (II) 589.2…HardMatch the list
  5. 26 Jun 2022, Shift 2 · Q66s-block element which **cannot** be qualitatively confirmed by the flame test isEasySingle correct
  6. 24 Feb 2021, Shift 2 · Q37Match List - I with List - II. List - I (Salt) | List - II (Flame colour wavelength) (a) LiCl | (i) 455.5 nm (b) NaCl | (ii) 670.8 nm (c)…MediumMatch the list
  7. 4 Aug 2021, Shift 1 · Q50Match List I with List II List I (Metal salt) List II (Colour to the flame) A. Cu2+\mathrm{Cu^{2+}} I. Brick Red B. Sr2+\mathrm{Sr^{2+}} II.…EasyMatch the list

Shifts: 24 Feb 2021, Shift 2, 4 Aug 2021, Shift 1, 26 Jun 2022, Shift 2, 29 Jun 2022, Shift 1, 15 Apr 2023, Shift 1, 30 Jan 2024, Shift 2, 6 Apr 2024, Shift 2.

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