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Saturday, 31 October

JEE Main · Chemistry · Some Basic Concepts of Chemistry

Limiting Reagent and Reaction Yield

JEE Main asked Limiting Reagent and Reaction Yield 6 times in 5 of the 108 shifts Lumi analysed, in 2020, 2022, 2023 and 2024. It belongs to Mole Concept, in Some Basic Concepts of Chemistry (Chemistry). The longest wait between two years asking it was 2 years. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 5 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, 2022, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200’210.10’220.07’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 3 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20231 of 12
  • 202222 of 24
  • 20210 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.

  • Product moles from limiting reagent
  • Yield with limiting reagent

Difficulty

Easy 4Medium 2Hard 0

6 of the 6 questions had a numerical answer.

Every question

All 6 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 1 · Q81Consider the following reaction : 3PbCl2+2(NH4)3PO4→Pb3(PO4)2+6NH4Cl\mathrm{3PbCl_2 + 2(NH_4)_3PO_4 \rightarrow Pb_3(PO_4)_2 + 6NH_4Cl} If 72 mmol of PbCl2\mathrm{PbCl_2} is…EasyNumerical value
  2. 6 Apr 2023, Shift 1 · Q81If 5 moles of BaCl2\mathrm{BaCl_2} is mixed with 2 moles of Na3PO4\mathrm{Na_3PO_4}, the maximum number of moles of Ba3(PO4)2\mathrm{Ba_3(PO_4)_2}…EasyNumerical value
  3. 26 Jun 2022, Shift 2 · Q81CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to the formation of…MediumNumerical value
  4. 26 Jun 2022, Shift 2 · Q90The moles of methane required to produce 81 g of water after complete combustion is ________ × 10−2\times\,10^{-2} mol. [nearest integer]EasyNumerical value
  5. 28 Jul 2022, Shift 1 · Q81In the given reaction, X+Y+3Z⇌XYZ3\mathrm{X+Y+3Z\rightleftharpoons XYZ_3} if one mole of each of X and Y with 0.05 mol of Z gives compound…MediumNumerical value
  6. 4 Sep 2020, Shift 1 · Q46The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is __________.EasyNumerical value

Shifts: 4 Sep 2020, Shift 1, 26 Jun 2022, Shift 2, 28 Jul 2022, Shift 1, 6 Apr 2023, Shift 1, 1 Feb 2024, Shift 1.

Same topic

Other ideas in Mole Concept

Mole Concept has 18 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas