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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 18 March 2021, Shift 2, Chemistry Q33

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

The charges on the colloidal CdS sol and TiO2\mathrm{TiO_2} sol are, respectively :
  1. (1)positive and positive
  2. (2)negative and positiveOfficial answer
  3. (3)positive and negative
  4. (4)negative and negative

Official answer

Option 2

NTA final key.

Chapter
Surface Chemistry
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.