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Saturday, 31 October

JEE Main · Chemistry · Some Basic Concepts of Chemistry

Theoretical and Percent Yield

JEE Main asked Theoretical and Percent Yield 7 times in 7 of the 108 shifts Lumi analysed, in 2021 and 2022. It belongs to Stoichiometry, in Some Basic Concepts of Chemistry (Chemistry). The longest wait between two years asking it was 1 year. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
2 of 8
First asked
2021
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200.17’210.07’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 5 in 24 shifts · 2022: 2 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
  • 20222 of 24
  • 20215 of 24
  • 20200 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 yield of product
  • Mass of product from bromine at given yield

Difficulty

Easy 5Medium 2Hard 0

7 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. 29 Jul 2022, Shift 1 · Q89In bromination of Propyne, with Bromine 1, 1, 2, 2-tetrabromopropane is obtained in 27% yield. The amount of 1, 1, 2, 2-tetrabromopropane…MediumNumerical value
  2. 27 Jul 2022, Shift 2 · Q90In the above reaction, 5 g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is __________…EasyNumerical valueHas a figure
  3. 18 Mar 2021, Shift 2 · Q59[figure: reaction scheme] Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8 g of m-bromo benzoic acid. The…EasyNumerical valueHas a figure
  4. 17 Mar 2021, Shift 2 · Q60[reaction scheme] Consider the above reaction. The percentage yield of amide product is __________. (Round off to the Nearest Integer).…MediumNumerical valueHas a figure
  5. 17 Mar 2021, Shift 1 · Q60[reaction drawn: see figure_note] In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield…EasyNumerical valueHas a figure
  6. 22 Jul 2021, Shift 2 · Q60Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene ________. (Nearest integer)EasyNumerical value
  7. 24 Feb 2021, Shift 2 · Q601.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained…EasyNumerical value

Shifts: 24 Feb 2021, Shift 2, 17 Mar 2021, Shift 2, 17 Mar 2021, Shift 1, 18 Mar 2021, Shift 2, 22 Jul 2021, Shift 2, 27 Jul 2022, Shift 2, 29 Jul 2022, 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