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Saturday, 31 October

JEE Main · Chemistry · Surface Chemistry

Optical and Kinetic Properties

JEE Main asked Optical and Kinetic Properties 5 times in 5 of the 108 shifts Lumi analysed, in 2017, 2020, 2021, 2022 and 2023. It belongs to Colloids, in Surface Chemistry (Chemistry). The longest wait between two years asking it was 3 years, across 2018 and 2019, which Lumi has no shifts for.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
5 of 8
First asked
2017
last in 2023
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2017, 2020, 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.510.83’170.08’200.03’210.03’220.07’230’240’250’26

Raw count: 2017: 1 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 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
  • 20221 of 24
  • 20211 of 24
  • 20201 of 12
  • 20171 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.

  • Assertion-reason on tyndall effect
  • Select conditions for tyndall effect

Difficulty

Easy 3Medium 2Hard 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 2 · Q63Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The diameter of…MediumAssertion–reason
  2. 25 Jun 2022, Shift 1 · Q62**Incorrect** statement for Tyndall effect is :EasySingle correct
  3. 27 Aug 2021, Shift 1 · Q34Tyndall effect is more effectively shown by :EasySingle correct
  4. 3 Sep 2020, Shift 1 · Q31Tyndall effect is observed when :EasySingle correct
  5. 2 Apr 2017 (offline) · Q34The Tyndall effect is observed only when following conditions are satisfied : (a) The diameter of the dispersed particles is much smaller…MediumOther

Shifts: 2 Apr 2017 (offline), 3 Sep 2020, Shift 1, 27 Aug 2021, Shift 1, 25 Jun 2022, Shift 1, 13 Apr 2023, Shift 2.

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