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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 18 March 2021, Shift 2, Chemistry Q35

Question 35 of 90 in this shift, Chemistry question 5 of 30, Section A.

Match List - I with List - II : List - I List - II (a) Mercury (i) Vapour phase refining (b) Copper (ii) Distillation Refining (c) Silicon (iii) Electrolytic Refining (d) Nickel (iv) Zone Refining Choose the most appropriate answer from the option given below :
  1. (1)(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)Official answer
  2. (2)(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
  3. (3)(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
  4. (4)(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

Official answer

Option 1

NTA final key.

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. 4 Sep 2020, Shift 1 · Q33Among statements (a) - (d), the correct ones are : (a) Lime stone is decomposed to CaO during the extraction of iron from its oxides. (b)…MediumOther

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.