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Saturday, 31 October

JEE Main · Chemistry · Solutions

Van't Hoff Factor (i)

JEE Main asked Van't Hoff Factor (i) 7 times in 7 of the 108 shifts Lumi analysed, in 2021, 2022, 2023 and 2024. It belongs to Colligative Properties, in Solutions (Chemistry). The longest wait between two years asking it was 1 year. In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
4 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, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.14’210.03’220.07’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 4 in 24 shifts · 2022: 1 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
  • 20221 of 24
  • 20214 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.

  • Van't hoff factor from freezing point depression
  • Order of van't hoff factor with concentration

Difficulty

Easy 2Medium 5Hard 0

4 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. 1 Feb 2024, Shift 1 · Q64We have three aqueous solutions of NaCl labelled as 'A', 'B' and 'C' with concentration 0.1 M, 0.01 M and 0.001 M, respectively. The value…MediumSingle correct
  2. 12 Apr 2023, Shift 1 · Q8480 mole percent of MgCl2\mathrm{MgCl_2} is dissociated in aqueous solution. The vapour pressure of 1.0 molal aqueous solution of…MediumNumerical value
  3. 25 Jul 2022, Shift 1 · Q63The depression in freezing point observed for a formic acid solution of concentration 0.5 mL L−10.5\ \mathrm{mL\,L^{-1}} is 0.0405∘0.0405^\circC.…MediumSingle correct
  4. 25 Feb 2021, Shift 1 · Q541 molal aqueous solution of an electrolyte A2B3\mathrm{A_2B_3} is 60% ionised. The boiling point of the solution at 1 atm is ________ K.…MediumNumerical value
  5. 31 Aug 2021, Shift 1 · Q33Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression ?EasySingle correct
  6. 26 Aug 2021, Shift 1 · Q54Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of 0.10 M…EasyNumerical value
  7. 4 Aug 2021, Shift 2 · Q560.7 cm3\mathrm{cm^3} of compound A (molar mass = 70 g mol−1\mathrm{g\ mol^{-1}}, density = 1.024 g cm−3\mathrm{g\ cm^{-3}}) is dissolved in 1…MediumNumerical value

Shifts: 25 Feb 2021, Shift 1, 4 Aug 2021, Shift 2, 26 Aug 2021, Shift 1, 31 Aug 2021, Shift 1, 25 Jul 2022, Shift 1, 12 Apr 2023, Shift 1, 1 Feb 2024, Shift 1.

Same topic

Other ideas in Colligative Properties

Colligative Properties has 21 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