Learn

Friday, 9 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 29 June 2022, Shift 1, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 of 30, Section A.

Which of the following is a correct statement ?
  1. (1)Brownian motion destabilises sols.
  2. (2)Any amount of dispersed phase can be added to emulsion without destabilising it.
  3. (3)Mixing two oppositely charged sols in equal amount neutralises charges and stabilises colloids.
  4. (4)Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.Official answer

Official answer

Option 4

NTA final key (2022 Session 1).

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Lyophilic and Lyophobic Sols

Same topic in other shifts

All Colloids questions
  1. 8 Apr 2023, Shift 2 · Q87Coagulating value of the electrolytes AlCl3\mathrm{AlCl_3} and NaCl for As2S3\mathrm{As_2S_3} are 0.09 and 50.04 respectively. The coagulating…EasyNumerical value
  2. 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
  3. 24 Jun 2022, Shift 1 · Q65Given below are two statements : Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on…MediumTwo statements
  4. 25 Jul 2021, Shift 1 · Q32Sodium stearate CH3(CH2)16COO−Na+\mathrm{CH_3(CH_2)_{16}COO^-Na^+} is an anionic surfactant which forms micelles in oil. Choose the correct statement for…MediumSingle correct
  5. 16 Mar 2021, Shift 2 · Q32The INCORRECT statements below regarding colloidal solutions is :EasySingle correct
  6. 8 Jan 2020, Shift 1 · Q28As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :MediumSingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.