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Saturday, 31 October

JEE Main · Chemistry · Some Basic Concepts of Chemistry

Hydrocarbon Combustion General Equation

JEE Main asked Hydrocarbon Combustion General Equation 4 times in 4 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2026. It belongs to Stoichiometry, in Some Basic Concepts of Chemistry (Chemistry). The longest wait between two years asking it was 4 years.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
4 of 8
First asked
2020
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170.08’200.03’210.03’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20221 of 24
  • 20211 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 mass from combustion of hydrocarbon
  • Mass of reactant from product

Difficulty

Easy 2Medium 2Hard 0

2 of the 4 questions had a numerical answer.

Every question

All 4 questions

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

  1. 2 Apr 2026, Shift 2 · Q51The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g) of CO2(g)CO_2(g) formed…MediumSingle correct
  2. 24 Jun 2022, Shift 1 · Q61If a rocket runs on a fuel (C15H30\mathrm{C_{15}H_{30}}) and liquid oxygen, the weight of oxygen required and CO2\mathrm{CO_2} released for…MediumSingle correct
  3. 25 Jul 2021, Shift 1 · Q59Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is ________×10−1\times10^{-1} g. (in…EasyNumerical value
  4. 5 Sep 2020, Shift 1 · Q47The minimum number of moles of O2\mathrm{O_2} required for complete combustion of 1 mole of propane and 2 moles of butane is __________.EasyNumerical value

Shifts: 5 Sep 2020, Shift 1, 25 Jul 2021, Shift 1, 24 Jun 2022, Shift 1, 2 Apr 2026, 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