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Saturday, 31 October

JEE Main · Chemistry · Thermodynamics (Chemistry)

Constant Enthalpy of Neutralization

JEE Main asked Constant Enthalpy of Neutralization 3 times in 3 of the 108 shifts Lumi analysed, in 2021, 2022 and 2024. It belongs to Enthalpy and Hess's Law, in Thermodynamics (Chemistry) (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2021
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.03’210.03’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 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
  • 20230 of 12
  • 20221 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.

  • Assertion reason enthalpy of neutralisation
  • Temperature rise on mixing acid and base

Difficulty

Easy 1Medium 2Hard 0

2 of the 3 questions had a numerical answer.

Every question

All 3 questions

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

  1. 5 Apr 2024, Shift 1 · Q72Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : Enthalpy of…EasyAssertion–reason
  2. 29 Jul 2022, Shift 1 · Q84When 600 mL of 0.2 M HNO3\mathrm{HNO_3} is mixed with 400 mL of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is…MediumNumerical value
  3. 27 Aug 2021, Shift 1 · Q52200 mL of 0.2 M HCl is mixed with 300 mL of 0.1 M NaOH. The molar heat of neutralization of this reaction is −57.1-57.1 kJ. The increase in…MediumNumerical value

Shifts: 27 Aug 2021, Shift 1, 29 Jul 2022, Shift 1, 5 Apr 2024, Shift 1.

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