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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceOtherMediumRecall

JEE Main 4 September 2020, Shift 1, Chemistry Q33

Question 33 of 75 in this shift, Chemistry question 8 of 25.

Among statements (a) - (d), the correct ones are : (a) Lime stone is decomposed to CaO during the extraction of iron from its oxides. (b) In the extraction of silver, silver is extracted as an anionic complex. (c) Nickel is purified by Mond's process. (d) Zr and Ti are purified by Van Arkel method.
  1. (1)(b), (c) and (d) only
  2. (2)(a), (b), (c) and (d)Official answer
  3. (3)(c) and (d) only
  4. (4)(a), (c) and (d) only

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
General Principles and Processes of Isolation of Elements
Topic
Metallurgical Extraction
Idea tested
Metal Refining Techniques

Same idea in other shifts

Asked 6× in all
  1. 13 Apr 2023, Shift 1 · Q65Which one of the following is most likely a mismatch ?MediumSingle correct
  2. 27 Jul 2022, Shift 1 · Q67Which of the following methods are not used to refine any metal? A. Liquation B. Calcination C. Electrolysis D. Leaching E. Distillation…EasyOther
  3. 25 Jun 2022, Shift 2 · Q67Given below are two statements. Statement I: During electrolytic refining, blister copper deposits precious metals. Statement II: In the…MediumTwo statements
  4. 25 Feb 2021, Shift 2 · Q35The method used for the purification of Indium is :EasySingle correct
  5. 18 Mar 2021, Shift 2 · Q35Match List - I with List - II : List - I List - II (a) Mercury (i) Vapour phase refining (b) Copper (ii) Distillation Refining (c) Silicon…EasyMatch the list

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.