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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 27 August 2021, Shift 1, Chemistry Q34

Question 34 of 90 in this shift, Chemistry question 4 of 30, Section A.

Tyndall effect is more effectively shown by :
  1. (1)true solution
  2. (2)lyophilic colloid
  3. (3)lyophobic colloidOfficial answer
  4. (4)suspension

Official answer

Option 3

NTA final key.

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Optical and Kinetic Properties

Same idea in other shifts

Asked 5× in all
  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. 3 Sep 2020, Shift 1 · Q31Tyndall effect is observed when :EasySingle correct
  4. 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

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.