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Chemistry - General Principles and Processes of Isolation of Metals

Practise 120 JEE Main previous year questions on General Principles and Processes of Isolation of Metals, compiled from papers spanning 2002 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Main tests.

General Principles and Processes of Isolation of Metals has been asked in 16 of the 25 years of JEE Main papers analysed (2002–2026), with 120 questions in all. 73% of them were easy, 26% moderate and 2% tough. Most of its questions came from 2021, with 27 questions that year. In the last three years (2024–2026) it had 1 question across 49 papers, about 0 per paper.

The chapter's 6 topics are not weighted equally: Extraction of Metals (31 questions, 26%), Concentration of the Ore (27 questions, 23%), and Minerals and ores (24 questions, 20%) have been asked the most. Extraction of Metals has also led over the last five years, with 12 questions. Extraction of Metals has produced the most tough questions (1).

  1. 1Identify the incorrect pair from the following :29 Jan, 2024 (M)Minerals and ores
  2. 2Which one of the following is not an example of calcination?15 Apr, 2023 (M)Concentration of the Ore
  3. 3Which one of the following is most likely a mismatch?13 Apr, 2023 (M)Refining of Crude Metal
  4. 4Given below are two statements related to Ellingham diagram : Statement I : Ellingham diagrams can be constructed for formation of oxides, s13 Apr, 2023 (E)Reduction to Crude Metal
  5. 5Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In the Ellingham diagram, 12 Apr, 2023 (M)Reduction to Crude Metal
  6. 6In the extraction process of copper, the product obtained after carrying out the reactions (i) 2 Cu 2 S + 3 O 2 2 Cu 2 O + 2 SO 2 (ii) 2 Cu 11 Apr, 2023 (M)Extraction of Metals
  7. 7Given below are two statements: Statement I: In the metallurgy process,sulphide ore is converted to oxide before reduction. Statement II: Ox11 Apr, 2023 (E)Concentration of the Ore
  8. 8Which of the following is used as a stabilizer during the concentration of sulphide ores?10 Apr, 2023 (M)Concentration of the Ore
  9. 9Which of the following metals can be extracted through alkali leaching technique?08 Apr, 2023 (M)Extraction of Metals
  10. 10In Hall-Heroult process, the following is used for reducing Al 2 O 3 :-08 Apr, 2023 (E)Extraction of Metals
  11. 11Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : In an Ellingham diagram, 01 Feb, 2023 (M)Reduction to Crude Metal
  12. 12Among following compounds, the number of those present in copper matte is A. CuCO 3 B. Cu 2 S C. Cu 2 O D. FeO01 Feb, 2023 (E)Minerals and ores
  13. 13The methods NOT involved in concentration of ore are (A) Liquation (B) Leaching (C) Electrolysis (D) Hydraulic washing (E) Froth floatation 31 Jan, 2023 (M)Concentration of the Ore
  14. 14Which one of the following statements is incorrect ?31 Jan, 2023 (E)Refining of Crude Metal
  15. 15In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:30 Jan, 2023 (M)Extraction of Metals
  16. 16Given below are two statements: Statement I: During Electrolytic refining, the pure metal is made to act as anode and its impure metallic fo30 Jan, 2023 (E)Refining of Crude Metal
  17. 17The reaction representing the Mond process for metal refining is ______29 Jan, 2023 (M)Refining of Crude Metal
  18. 18The major component of which of the following ore is sulphide based mineral?29 Jan, 2023 (E)Minerals and ores
  19. 19Which one of the following reactions does not occur during extraction of copper ?25 Jan, 2023 (M)Extraction of Metals
  20. 20Given below are two statements:- Statement I:- In froth floatation method a rotating paddle agitates the mixture to drive air out of it. Sta25 Jan, 2023 (E)Concentration of the Ore
  21. 21Match List I with List II. List I List II A. Reverberatory furnace I. Pig iron B. Electrolytic cell II. Aluminium C. Blast furnace III. Sili24 Jan, 2023 (M)Refining of Crude Metal
  22. 22The metal which is extracted by oxidation and subsequent reduction from its ore is :24 Jan, 2023 (E)Extraction of Metals
  23. 23In metallurgy the term gangue is used for29 Jul, 2022 (M)Minerals and ores
  24. 24In liquation process used for tin Sn , the metal29 Jul, 2022 (E)Refining of Crude Metal
  25. 25Which of the reaction is suitable for concentrating ore by leaching process?28 Jul, 2022 (M)Concentration of the Ore
  26. 26Which of the following methods are not used to refine any metal? (A) Liquation (B) Calcination (C) Electrolysis (D) Leaching (E) Distillatio27 Jul, 2022 (M)Refining of Crude Metal
  27. 27Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, t27 Jul, 2022 (E)Minerals and ores
  28. 28Refining using liquation method is the most suitable for metals with26 Jul, 2022 (M)Refining of Crude Metal
  29. 29The metal that is not extracted from its sulphide ore is26 Jul, 2022 (E)Extraction of Metals
  30. 30The compound(s) that is(are) removed as slag during the extraction of copper is : (1) CaO (2) FeO (3) Al 2 O 3 (4) ZnO (5) NiO Choose the co25 Jul, 2022 (M)Extraction of Metals
  31. 31Given below are two statements. Statement I : Pig iron is obtained by heating cast iron with scrap iron. Statement II : Pig iron has a relat25 Jul, 2022 (E)Extraction of Metals
  32. 32In isolation of which one of the following metals from their ores, the use of cyanide salt is commonly not involved?29 Jun, 2022 (M)Extraction of Metals
  33. 33Match List I with List II . List I With Ore List II Composition A.Siderite I. FeCO 3 B.Malachite II. CuCO 3 Cu ( OH ) 2 C.Sphalerite III. Zn29 Jun, 2022 (E)Minerals and ores
  34. 34Given are two statements one is labelled as Assertion and other is labelled as Reason. Assertion : Magnesium can reduce Al 2 O 3 at a temper28 Jun, 2022 (M)Extraction of Metals
  35. 35In the metallurgical extraction of copper, following reaction is used : FeO + SiO 2 FeSiO 3 FeO and FeSiO 3 respectively are.28 Jun, 2022 (E)Flux and Refractory materials
  36. 36Match List - I with List - II. List-I List-II A Concentration of gold ore I Aniline B Leaching of alumina II NaOH C Froth stabiliser III SO 27 Jun, 2022 (M)Concentration of the Ore
  37. 37Statement I: Leaching of gold with cyanide ion in absence of air / O 2 leads to cyano complex of Au (III). Statement II: Zinc is oxidized du27 Jun, 2022 (E)Concentration of the Ore
  38. 38Given below are two statements : Statement I : According to the Ellingham diagram, any metal oxide with higher G is more stable than the one26 Jun, 2022 (M)Reduction to Crude Metal
  39. 39The role of depressants in Froth Floation method is to26 Jun, 2022 (E)Concentration of the Ore
  40. 40Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex A , which on reaction with zinc forms the elementa25 Jun, 2022 (M)Concentration of the Ore
  41. 41Given below are two statements. Statement I: During electrolytic refining. blister copper deposits precious metals. Statement II: In the pro25 Jun, 2022 (E)Refining of Crude Metal
  42. 42Match List - I with List - II : List-I List-II (A) Sphalerite (I) FeCO 3 (B) Calamine (II) PbS (C) Galena (III) ZnCO 3 (D) Siderite (IV) ZnS24 Jun, 2022 (M)Minerals and ores
  43. 43Which of the following chemical reactions represents Hall-Heroult Process?24 Jun, 2022 (E)Extraction of Metals
  44. 44(a) Baryte, (b) Galena, (c) Zinc blende and (d) Copper pyrites. How many of these minerals are sulphide based?24 Jun, 2022 (E)Minerals and ores
  45. 45Calamine and Malachite, respectively, are the ores of :01 Sep, 2021 (E)Minerals and ores
  46. 46Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Treatment of bromi31 Aug, 2021 (M)Extraction of Metals
  47. 47In the electrolytic refining of blister copper, the total number of main impurities, from the following, removed as anode mud is ___________31 Aug, 2021 (E)Extraction of Metals
  48. 48Which refining process is generally used in the purification of low melting metals?27 Aug, 2021 (M)Refining of Crude Metal
  49. 49Match List-I with List-II : List-I (Name of ore/mineral) List-I (Chemical formula) a Calamine i ZnS b Malachite ii FeCO 3 c Siderite iii ZnC27 Aug, 2021 (E)Minerals and ores
  50. 50Given below are two statements. Statement I: The choice of reducing agents for metals extraction can be made by using the Ellingham diagram,26 Aug, 2021 (M)Reduction to Crude Metal

Frequently Asked Questions

1.How many questions are available for General Principles and Processes of Isolation of Metals?

This chapter includes 120 questions compiled from JEE Main papers spanning 2002 to 2024.

2.Are these questions only from JEE Main, or from other exams too?

These are JEE Main questions specifically for the General Principles and Processes of Isolation of Metals chapter. Questions from other exams like NTA Abhyas (JEE Main) or JEE Advanced are organised separately under their respective exam sections.

3.Is General Principles and Processes of Isolation of Metals an important chapter for JEE Main Chemistry?

General Principles and Processes of Isolation of Metals has appeared in 16 of the 25 years of JEE Main papers covered here, with 120 questions across 115 papers - about one per paper it appears in.

4.What is the difficulty level of General Principles and Processes of Isolation of Metals questions in JEE Main?

Of the 120 questions analysed for this chapter, 73% are easy, 26% moderate and 2% tough. 2021 had the most, with 27 questions.

5.Which topics in General Principles and Processes of Isolation of Metals should I focus on?

These topics have carried the most weightage in General Principles and Processes of Isolation of Metals:

  • Extraction of Metals - 31 questions (26%)
  • Concentration of the Ore - 27 questions (23%)
  • Minerals and ores - 24 questions (20%)
  • Extraction of Metals has produced the most tough questions (1).
6.Is General Principles and Processes of Isolation of Metals's weightage in JEE Main going up or down?

Across all 115 papers analysed, General Principles and Processes of Isolation of Metals has averaged about 1.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.