JEE Main · Chemistry · Solutions
Degree of Dissociation from Van't Hoff Factor
JEE Main asked Degree of Dissociation from Van't Hoff Factor 6 times in 6 of the 108 shifts Lumi analysed, in 2021, 2022, 2023, 2024 and 2025. 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
- 6
- in 6 shifts
- Years
- 5 of 8
- First asked
- 2021
- last in 2025
- Pattern
- Asked most years
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2021, 2022, 2023, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.
Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 in 18 shifts · 2025: 1 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.
How JEE Main framed it
Numerical value is the usual form. Skill tested: calculation.
- Percentage dissociation from van't hoff factor
- Degree of ionization from boiling point
Difficulty
6 of the 6 questions had a numerical answer.
Every question
All 6 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 7 Apr 2025, Shift 1 · Q72The percentage dissociation of a salt () solution at given temperature (van't Hoff factor ) is ___________ %(Nearest…EasyNumerical value
- 8 Apr 2024, Shift 1 · Q84A solution containing 10 g of an electrolyte in 100 g of water boils at C. The degree of ionization of the…MediumNumerical value
- 10 Apr 2023, Shift 1 · Q84If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0.3, then the observed freezing point will be…MediumNumerical value
- 26 Jun 2022, Shift 1 · Q82A 0.5 percent solution of potassium chloride was found to freeze at °C. The percentage dissociation of potassium chloride is…MediumNumerical value
- 17 Mar 2021, Shift 2 · Q54A 1 molal solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution…MediumNumerical value
- 25 Feb 2021, Shift 2 · Q55If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the…MediumNumerical value
Shifts: 25 Feb 2021, Shift 2, 17 Mar 2021, Shift 2, 26 Jun 2022, Shift 1, 10 Apr 2023, Shift 1, 8 Apr 2024, Shift 1, 7 Apr 2025, 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.
- Freezing Point Depression16× · 2024
- Boiling Point Elevation13× · 2026
- Relative Lowering of VP12× · 2026
- Osmotic Pressure7× · 2026
- Van't Hoff Factor (i)7× · 2024
- Calculating Ka from Freezing Point Depression4× · 2026
- Isotonic Solutions4× · 2023
- Degree of Association from Van't Hoff Factor4× · 2022
- Hypertonic and Hypotonic Solutions2× · 2026
- Osmometry for Macromolecule Molar Mass2× · 2026
- Osmotic Pressure of Mixed Solutions2× · 2026
- Antifreeze Mass Calculations2× · 2024