GATE Mineral Processing and Extractive Metallurgy: Non-ferrous extraction – Previous Year Questions

10 GATE previous year questions on Non-ferrous extraction (Mineral Processing and Extractive Metallurgy, Metallurgical Engineering) with answers and explanations, from every paper.

1. GATE 2021 MT Q23 (1 mark, Multiple choice) – Which is a hydrometallurgical operation?
2. GATE 2022 MT Q13 (1 mark, Multiple choice) – Titanium is produced commercially by
3. GATE 2023 MT Q16 (1 mark, Multiple choice) – Among the following options, a process for liquid-liquid separation is
4. GATE 2023 MT Q42 (2 marks, Multiple choice) – Match processes with applications. Column I: P. Fused salt electrolysis Q. Carbothermal reduction R. Oxidation-refining S. Matte converting Column II:…
5. GATE 2023 MT Q49 (2 marks, Multiple select) – Identify the INCORRECT statement(s)
6. GATE 2024 MT Q20 (1 mark, Multiple choice) – Which process is NOT related to extraction and refining of titanium from ilmenite ore?
7. GATE 2024 MT Q21 (1 mark, Multiple choice) – Which statement about industrial aluminium production from pure dry alumina by Hall–Héroult electrolytic reduction is correct?
8. GATE 2024 MT Q60 (2 marks, Numerical answer) – A 1000 kg sphalerite concentrate containing 60% ZnS is completely roasted with stoichiometric pure oxygen. The oxygen required is kg (one decimal…
9. GATE 2026 MT Q25 (1 mark, Multiple choice) – Which one of the following options is correct? Red mud is generated in the production of:
10. GATE 2026 MT Q62 (2 marks, Numerical answer) – A copper ore contains 30 wt.% chalcopyrite (CuFeS 2) and the remaining gangue has no copper. The copper content of the ore is wt.%. (Rounded off to…