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Saturday, 31 October

JEE Main · Chemistry · Surface Chemistry

Lyophilic and Lyophobic Sols

JEE Main asked Lyophilic and Lyophobic Sols 5 times in 5 of the 108 shifts Lumi analysed, in 2021, 2022 and 2023. It belongs to Colloids, in Surface Chemistry (Chemistry). The longest wait between two years asking it was 1 year. In 2021 and 2022 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
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.

00.050.10’170’200.07’210.07’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 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
  • 20231 of 12
  • 20222 of 24
  • 20212 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.

  • True statement selection on colloids
  • Definition recall

Difficulty

Easy 4Medium 1Hard 0

Every question was multiple choice.

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. 13 Apr 2023, Shift 1 · Q63What happens when a lyophilic sol is added to a lyophobic sol?EasySingle correct
  2. 29 Jun 2022, Shift 1 · Q65Which of the following is a correct statement ?EasySingle correct
  3. 29 Jul 2022, Shift 1 · Q63100 mL of 5% (w/v) solution of NaCl in water was prepared in 250 mL beaker. Albumin from the egg was poured into NaCl solution and stirred…MediumSingle correct
  4. 25 Feb 2021, Shift 2 · Q33Which one of the following statements is FALSE for hydrophilic sols ?EasySingle correct
  5. 27 Aug 2021, Shift 2 · Q31Lyophilic sols are more stable than lyophobic sols because,EasySingle correct

Shifts: 25 Feb 2021, Shift 2, 27 Aug 2021, Shift 2, 29 Jun 2022, Shift 1, 29 Jul 2022, Shift 1, 13 Apr 2023, Shift 1.

Same topic

Other ideas in Colloids

Colloids has 16 ideas JEE Main has asked; 7 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas