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Topic Metallurgy
Asked 7 times across 3 UPSC exams over 4 years (2021–2025), peaking in 2025.
Key insights
- Most tested in CSE — 4 of 7 PYQs
- Most asked in 2025
- Recurs across 3 years (2021–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2021 → NDA 2023
How the concept evolved
Long-running — most appearances (4 of 7) predate 2016, and it still returns.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2025
Which one of the following metals is widely extracted by the electrolysis of its molten compound ?
- A Cu
- B Au
- C Sn
- D Na
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
NDA2023
Which one of the following metals can be extracted using carbon as reducing agent ?
- A Zinc ✓
- B Silver
- C Gold
- D Aluminum
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
CDS2021
What is the name of the process that converts sulphide ores into oxides by heating strongly in the presence of excess air?
- A Calcination
- B Roasting ✓
- C Smelting
- D Incineration
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
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