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Saturday, 31 October

JEE Main · Chemistry · General Principles and Processes of Isolation of Elements

Metal Refining Techniques

JEE Main asked Metal Refining Techniques 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2023. It belongs to Metallurgical Extraction, in General Principles and Processes of Isolation of Elements (Chemistry). The longest wait between two years asking it was 1 year. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
4 of 8
First asked
2020
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200.07’210.07’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20231 of 12
  • 20222 of 24
  • 20212 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Other is the usual form. Skill tested: recall.

  • Mismatch among metallurgy processes
  • Identify methods not used for refining

Difficulty

Easy 3Medium 3Hard 0

Every question was multiple choice.

Every question

All 6 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 13 Apr 2023, Shift 1 · Q65Which one of the following is most likely a mismatch ?MediumSingle correct
  2. 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
  3. 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
  4. 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
  5. 25 Feb 2021, Shift 2 · Q35The method used for the purification of Indium is :EasySingle correct
  6. 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

Shifts: 4 Sep 2020, Shift 1, 25 Feb 2021, Shift 2, 18 Mar 2021, Shift 2, 25 Jun 2022, Shift 2, 27 Jul 2022, Shift 1, 13 Apr 2023, Shift 1.

Same topic

Other ideas in Metallurgical Extraction

Metallurgical Extraction has 21 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas