Learn

Saturday, 31 October

JEE Main · Chemistry · Thermodynamics (Chemistry)

Bomb Calorimetry Calculations

JEE Main asked Bomb Calorimetry Calculations 7 times in 7 of the 108 shifts Lumi analysed, in 2021, 2022, 2023, 2024, 2025 and 2026. It belongs to Enthalpy and Hess's Law, in Thermodynamics (Chemistry) (Chemistry). The longest wait between two years asking it was 1 year. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
6 of 8
First asked
2021
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2023, 2024, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.03’210.07’220.07’230.05’240.13’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20241 of 18
  • 20231 of 12
  • 20222 of 24
  • 20211 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.

  • Enthalpy of formation from bomb calorimetry
  • Heat of combustion from calorimeter

Difficulty

Easy 0Medium 6Hard 1

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. 4 Apr 2026, Shift 2 · Q71If 3.365 g of ethanol (ll) is burnt completely in a bomb calorimeter at 298.15 K, the heat produced is 99.472 kJ. The…HardNumerical value
  2. 3 Apr 2025, Shift 2 · Q72A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ…MediumNumerical value
  3. 5 Apr 2024, Shift 1 · Q83The heat of combustion of solid benzoic acid at constant volume is −321.30-321.30 kJ at 27∘27^\circC. The heat of combustion at constant…MediumNumerical value
  4. 8 Apr 2023, Shift 2 · Q83For complete combustion of ethene, C2H4(g)+3O2(g)→2CO2(g)+2H2O(l)\mathrm{C_2H_4(g) + 3O_2(g) \rightarrow 2CO_2(g) + 2H_2O(l)} the amount of heat produced as measured…MediumNumerical value
  5. 27 Jul 2022, Shift 2 · Q83A gas (Molar mass=280 g mol−1\mathrm{mol^{-1}}) was burnt in excess O2\mathrm{O_2} in a constant volume calorimeter and during combustion the…MediumNumerical value
  6. 26 Jul 2022, Shift 1 · Q842.4 g coal is burnt in a bomb calorimeter in excess of oxygen at 298 K and 1 atm pressure. The temperature of the calorimeter rises from…MediumNumerical value
  7. 25 Feb 2021, Shift 1 · Q53The reaction of cyanamide, NH2CN(s)\mathrm{NH_2CN_{(s)}} with oxygen was run in a bomb calorimeter and ΔU\Delta U was found to be −742.24-742.24 kJ…MediumNumerical value

Shifts: 25 Feb 2021, Shift 1, 26 Jul 2022, Shift 1, 27 Jul 2022, Shift 2, 8 Apr 2023, Shift 2, 5 Apr 2024, Shift 1, 3 Apr 2025, Shift 2, 4 Apr 2026, Shift 2.

Same topic

Other ideas in Enthalpy and Hess's Law

Enthalpy and Hess's Law has 23 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