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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 26 February 2021, Shift 2, Chemistry Q32

Question 32 of 90 in this shift, Chemistry question 2 of 30, Section A.

The nature of charge on resulting colloidal particles when FeCl3\mathrm{FeCl_3} is added to excess of hot water is :
  1. (1)positiveOfficial answer
  2. (2)negative
  3. (3)neutral
  4. (4)sometimes positive and sometimes negative

Official answer

Option 1

NTA final key.

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Chemical Methods of Preparation

Same topic in other shifts

All Colloids questions
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  3. 10 Apr 2023, Shift 2 · Q63Ferric chloride is applied to stop bleeding because -EasySingle correct
  4. 13 Apr 2023, Shift 1 · Q63What happens when a lyophilic sol is added to a lyophobic sol?EasySingle correct
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  6. 15 Apr 2023, Shift 1 · Q8620 mL of 0.5 M NaCl is required to coagulate 200 mL of As2S3\mathrm{As_2S_3} solution in 2 hours. The coagulating value of NaCl is __________.EasyNumerical value

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.