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Saturday, 31 October

JEE Main · Chemistry · Solutions

Mole Fraction Calculation

JEE Main asked Mole Fraction Calculation 5 times in 5 of the 108 shifts Lumi analysed, in 2020, 2024 and 2026. It belongs to Mole Concept, in Solutions (Chemistry). The longest wait between two years asking it was 4 years. In 2024 and 2026 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
3 of 8
First asked
2020
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.150.30’170.08’200’210’220’230.09’240’250.22’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 in 18 shifts · 2025: 0 in 8 shifts · 2026: 2 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20262 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20201 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.

  • Mole fraction from mass percent
  • Statement i/ii on mole fraction and raoult deviation

Difficulty

Easy 3Medium 2Hard 0

2 of the 5 questions had a numerical answer.

Every question

All 5 questions

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

  1. 8 Apr 2026, Shift 2 · Q52Given below are two statements : Given : Molar mass of C, H, O, Cl are 12, 1, 16 and 35.5 g mol−1^{-1}, respectively Statement I : In 30%…MediumTwo statements
  2. 5 Apr 2026, Shift 1 · Q54What is the mole fraction of water in 10% by weight (w/w) of aqueous urea solution? [Given: Molar mass of H, O, C and N are 1, 16, 12 and…EasySingle correct
  3. 30 Jan 2024, Shift 2 · Q61If a substance 'A' dissolves in solution of a mixture of 'B' and 'C' with their respective number of moles as nA\mathrm{n_A},…EasySingle correct
  4. 8 Apr 2024, Shift 2 · Q85Molality of an aqueous solution of urea is 4.44 m. Mole fraction of urea in solution is x×10−3x \times 10^{-3}. Value of xx is ________.…MediumNumerical value
  5. 3 Sep 2020, Shift 1 · Q46The mole fraction of glucose (C6H12O6\mathrm{C_6H_{12}O_6}) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the…EasyNumerical value

Shifts: 3 Sep 2020, Shift 1, 30 Jan 2024, Shift 2, 8 Apr 2024, Shift 2, 5 Apr 2026, Shift 1, 8 Apr 2026, Shift 2.

Same topic

Other ideas in Mole Concept

Mole Concept has 18 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