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Chemistry - General Principles and Processes of Isolation of Metals

Practise 10 WBJEE previous year questions on General Principles and Processes of Isolation of Metals, compiled from papers spanning 2009 to 2021. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.

General Principles and Processes of Isolation of Metals has been asked in 8 of the 18 years of WBJEE papers analysed (2009–2026), with 10 questions in all. 90% of them were easy, 10% moderate and 0% tough. Most of its questions came from 2015, with 2 questions that year. In the last three years (2024–2026) it had 0 questions across 3 papers, about 0 per paper.

The chapter's 3 topics are not weighted equally: Extraction of Metals (6 questions, 60%), Minerals and ores (3 questions, 30%), and Refining of Crude Metal (1 question, 10%) have been asked the most.

  1. 1Extraction of a metal ( ) from its sulfide ore involves the following chemical reactions: The metal (M) may be2021Extraction of Metals
  2. 2In the Bayer's process, the leaching of alumina is done by using2019Extraction of Metals
  3. 3The role of fluorspar, which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite is2017Extraction of Metals
  4. 4"Extraction of gold involves the formation of complex ions and and respectively are2015Refining of Crude Metal
  5. 5Roasted copper pyrite on smelting with sand produces2015Extraction of Metals
  6. 6The ore chromite is2013Minerals and ores
  7. 7The important advantage(s) of Lintz and Donawitz (L.D.) process for the manufacture of steel is (are)2013Extraction of Metals
  8. 8Which of the following represents the composition of Carnallite mineral?2011Minerals and ores
  9. 9Which of the following metals has the largest abundance in the earth's crust ?2010Minerals and ores
  10. 10In aluminium extraction by the Bayer process, alumina is extracted from bauxite by sodium hydroxide at high temperature and pressures : Soli2009Extraction of Metals

Frequently Asked Questions

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

This chapter includes 10 questions compiled from WBJEE papers spanning 2009 to 2021.

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

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

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

General Principles and Processes of Isolation of Metals has appeared in 8 of the 18 years of WBJEE papers covered here, with 10 questions across 8 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 WBJEE?

Of the 10 questions analysed for this chapter, 90% are easy, 10% moderate and 0% tough. 2015 had the most, with 2 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 - 6 questions (60%)
  • Minerals and ores - 3 questions (30%)
  • Refining of Crude Metal - 1 question (10%)
6.Is General Principles and Processes of Isolation of Metals's weightage in WBJEE going up or down?

Across all 8 papers analysed, General Principles and Processes of Isolation of Metals has averaged about 1.3 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.