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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumApplication

JEE Main 26 August 2021, Shift 2, Chemistry Q33

Question 33 of 90 in this shift, Chemistry question 3 of 30, Section A.

The sol given below with negatively charged colloidal particles is :
  1. (1)KI added to AgNO3\mathrm{AgNO_3} solution
  2. (2)AgNO3\mathrm{AgNO_3} added to KI solutionOfficial answer
  3. (3)FeCl3\mathrm{FeCl_3} added to hot water
  4. (4)Al2O3⋅xH2O\mathrm{Al_2O_3{\cdot}}x\mathrm{H_2O} in water

Official answer

Option 2

NTA final key.

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Zeta Potential and Helmholtz Double Layer

Same idea in other shifts

Asked 2× in all
  1. 28 Jun 2022, Shift 1 · Q62The Zeta potential is related to which property of colloids ?EasySingle correct

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.