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Saturday, 31 October

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

Stoichiometry of Kjeldahl Method

JEE Main asked Stoichiometry of Kjeldahl Method 9 times in 9 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2024. It belongs to Stoichiometry, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry). The longest wait between two years asking it was 2 years. In 2020, 2021, 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
9
in 9 shifts
Years
4 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.17’200.07’210.10’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 2 in 24 shifts · 2022: 3 in 24 shifts · 2023: 0 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
  • 20230 of 12
  • 20223 of 24
  • 20212 of 24
  • 20202 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 kjeldahl method
  • Role of reagent in kjeldahl method

Difficulty

Easy 5Medium 4Hard 0

5 of the 9 questions had a numerical answer.

Every question

All 9 questions

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

  1. 1 Feb 2024, Shift 2 · Q87Following Kjeldahl's method, 1g of organic compound released ammonia, that neutralised 10 mL of 2M H2SO4\mathrm{H_2SO_4}. The percentage of…EasyNumerical value
  2. 1 Feb 2024, Shift 1 · Q71In Kjeldahl's method for estimation of nitrogen, CuSO4\mathrm{CuSO_4} acts as :EasySingle correct
  3. 29 Jun 2022, Shift 1 · Q88Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound…EasyNumerical value
  4. 24 Jun 2022, Shift 1 · Q88A 0.166 g sample of an organic compound was digested with conc. H2SO4\mathrm{H_2SO_4} and then distilled with NaOH. The ammonia gas evolved…MediumNumerical value
  5. 25 Jul 2022, Shift 1 · Q88While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.250.25 g of the compound…EasyNumerical value
  6. 17 Mar 2021, Shift 2 · Q42Nitrogen can be estimated by Kjeldahl's method for which of the following compound ?MediumDiagram basedHas a figure
  7. 25 Jul 2021, Shift 2 · Q590.8 g of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the…MediumNumerical value
  8. 3 Sep 2020, Shift 1 · Q45The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products ? (a) [figure: a six-membered ring drawn…MediumOtherHas a figure
  9. 8 Jan 2020, Shift 2 · Q40Kjeldahl's method cannot be used to estimate nitrogen for which of the following compounds ?EasySingle correctHas a figure

Shifts: 8 Jan 2020, Shift 2, 3 Sep 2020, Shift 1, 17 Mar 2021, Shift 2, 25 Jul 2021, Shift 2, 24 Jun 2022, Shift 1, 29 Jun 2022, Shift 1, 25 Jul 2022, Shift 1, 1 Feb 2024, Shift 2, 1 Feb 2024, Shift 1.

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