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Saturday, 31 October

JEE Main · Chemistry · Organic Chemistry: Some Basic Principles and Techniques

Stoichiometry of Dumas Method

JEE Main asked Stoichiometry of Dumas Method 10 times in 10 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2025. It belongs to Stoichiometry, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry). The longest wait between two years asking it was 3 years. In 2021, 2022 and 2025 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
10
in 10 shifts
Years
4 of 8
First asked
2020
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.30.60’170.08’200.10’210.07’220’230’240.50’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 3 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 4 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
  • 20254 of 8
  • 20240 of 18
  • 20230 of 12
  • 20222 of 24
  • 20213 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Percentage nitrogen by dumas method
  • Nitrogen percentage by dumas method

Difficulty

Easy 3Medium 6Hard 1

7 of the 10 questions had a numerical answer.

Every question

All 10 questions

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

  1. 7 Apr 2025, Shift 2 · Q74In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas (N2\mathrm{N_2}) at 300 K temperature and 715 mm Hg…MediumNumerical value
  2. 3 Apr 2025, Shift 2 · Q64In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm…MediumSingle correct
  3. 3 Apr 2025, Shift 1 · Q75During estimation of nitrogen by Dumas' method of compound X (0.42 g) [structure X: piperazine, six-membered ring with two NH groups at…EasyNumerical valueHas a figure
  4. 2 Apr 2025, Shift 2 · Q64In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715…MediumSingle correct
  5. 24 Jun 2022, Shift 2 · Q880.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N2_2 evolved (at STP) was found…EasyNumerical value
  6. 28 Jul 2022, Shift 2 · Q56A sample of 0.125g of an organic compound when analyzed by Duma's method yields 22.78 mL of nitrogen gas collected over KOH solution at…MediumNumerical value
  7. 16 Mar 2021, Shift 2 · Q60In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at 287 K and 758 mm of Hg…MediumNumerical value
  8. 31 Aug 2021, Shift 2 · Q60The transformation occurring in Duma’s method is given below…EasyNumerical value
  9. 27 Aug 2021, Shift 1 · Q60The number of moles of CuO, that will be utilized in Dumas method for estimating nitrogen in a sample of 57.5 g of…HardNumerical value
  10. 6 Sep 2020, Shift 2 · Q32Match the following : Test / Method — Reagent (i) Lucas Test (a) C6H5SO2Cl\mathrm{C_6H_5SO_2Cl} / aq. KOH (ii) Dumas method (b) HNO3\mathrm{HNO_3}…MediumMatch the list

Shifts: 6 Sep 2020, Shift 2, 16 Mar 2021, Shift 2, 27 Aug 2021, Shift 1, 31 Aug 2021, Shift 2, 24 Jun 2022, Shift 2, 28 Jul 2022, Shift 2, 2 Apr 2025, Shift 2, 3 Apr 2025, Shift 2, 3 Apr 2025, Shift 1, 7 Apr 2025, Shift 2.

Same topic

Other ideas in Stoichiometry

Stoichiometry has 24 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas