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Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 2 September 2020, Shift 1, Chemistry Q28

Question 28 of 75 in this shift, Chemistry question 3 of 25.

Which of the following is used for the preparation of colloids ?
  1. (1)Mond Process
  2. (2)Ostwald Process
  3. (3)Van Arkel Method
  4. (4)Bredig's Arc MethodOfficial answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Bredig's Arc Method

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. 29 Jun 2022, Shift 1 · Q65Which of the following is a correct statement ?EasySingle correct
  5. 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
  6. 16 Mar 2021, Shift 2 · Q32The INCORRECT statements below regarding colloidal solutions is :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 42 of the 174 JEE Main shifts held from 2017 to 2026.