Learn

Saturday, 31 October

JEE Main · Chemistry · The s-Block Elements

Hydration Enthalpy Trends

JEE Main asked Hydration Enthalpy Trends 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2022 and 2023. It belongs to The s-Block Elements (Chemistry). The longest wait between two years asking it was 1 year. In 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2021
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200.03’210.03’220.14’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 2 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
  • 20232 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

Single correct is the usual form. Skill tested: conceptual.

  • Order/ranking of hydration enthalpy
  • Sum of water of crystallisation

Difficulty

Easy 3Medium 1Hard 0

1 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. 11 Apr 2023, Shift 2 · Q88Mg(NO3)2⋅XH2O\mathrm{Mg(NO_3)_2{\cdot}XH_2O} and Ba(NO3)2⋅YH2O\mathrm{Ba(NO_3)_2{\cdot}YH_2O}, represent formula of the crystalline forms of nitrate salts. Sum…MediumNumerical value
  2. 6 Apr 2023, Shift 2 · Q67Ion having highest hydration enthalpy among the given alkaline earth metal ions is:EasySingle correct
  3. 25 Jun 2022, Shift 1 · Q66Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution ?EasySingle correct
  4. 31 Aug 2021, Shift 2 · Q35Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Lithium salts…EasyAssertion–reason

Shifts: 31 Aug 2021, Shift 2, 25 Jun 2022, Shift 1, 6 Apr 2023, Shift 2, 11 Apr 2023, Shift 2.

Same topic

Other ideas in s-Block Elements

s-Block Elements has 27 ideas JEE Main has asked; 20 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas