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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 13 April 2023, Shift 1, Chemistry Q63

Question 63 of 90 in this shift, Chemistry question 3 of 30, Section A.

What happens when a lyophilic sol is added to a lyophobic sol?
  1. (1)Lyophilic sol is dispersed in lyophobic sol.
  2. (2)Lyophobic sol is coagulated
  3. (3)Film of lyophilic sol is formed over lyophobic sol.Official answer
  4. (4)Film of lyophobic sol is formed over lyophilic sol.

Official answer

Option 3

NTA final key.

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Lyophilic and Lyophobic Sols

Same idea in other shifts

Asked 5× in all
  1. 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
  2. 29 Jun 2022, Shift 1 · Q65Which of the following is a correct statement ?EasySingle correct
  3. 27 Aug 2021, Shift 2 · Q31Lyophilic sols are more stable than lyophobic sols because,EasySingle correct
  4. 25 Feb 2021, Shift 2 · Q33Which one of the following statements is FALSE for hydrophilic sols ?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.