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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 30 July 2022, Shift 2, Chemistry Q36

Question 36 of 90 in this shift, Chemistry question 6 of 30, Section A.

Match List I with List II List I | List II A. Cyanide Process | I. Vapour phase refining B. Froth flotation process | II. Aluminium C. Hall-Heroult process | III. Dressing of ZnS D. Mond process | IV. Extraction of Au Choose the correct answer from the options given below :
  1. (1)A-IV, B-III, C-II, D-IOfficial answer
  2. (2)A-I, B-II, C-III, D-IV
  3. (3)A-II, B-III, C-IV, D-I
  4. (4)A-III, B-II, C-IV, D-I

Official answer

Option 1

NTA final key.

Chapter
General Principles and Processes of Isolation of Elements
Topic
Metallurgical Extraction
Idea tested
MacArthur-Forrest Cyanide Process

Same idea in other shifts

Asked 6× in all
  1. 25 Jun 2022, Shift 1 · Q64Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with zinc forms the…EasySingle correct
  2. 27 Jun 2022, Shift 1 · Q66Match List - I with List - II. List - I (A) Concentration of gold ore (B) Leaching of alumina (C) Froth stabiliser (D) Blister copper List…MediumMatch the list
  3. 27 Jun 2022, Shift 2 · Q63**Statement I:** Leaching of gold with cyanide ion in absence of air / O2\mathrm{O_2} leads to cyano complex of Au(III). **Statement II:**…MediumTwo statements
  4. 29 Jun 2022, Shift 1 · Q67In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved ?MediumSingle correct
  5. 25 Jul 2021, Shift 2 · Q35Match List I with List II : (Both having metallurgical terms) List - I (a) Concentration of Ag ore (b) Blast furnace (c) Blister copper…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.