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Topic Nanotechnology
Asked 6 times across 3 UPSC exams over 8 years (2014–2022), peaking in 2015.
Key insights
- Most tested in CSE — 4 of 6 PYQs
- Most asked in 2015
- Recurs across 5 years (2014–2022)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 2014 → EPFO 2015 → CDS 2021
How the concept evolved
Long-running — most appearances (3 of 6) predate 2016, and it still returns.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CSE2022
Consider the following statements
- Other than those made by humans, nanoparticles do not exist in nature
- Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics
- Nanoparticles of some commercial products which enter the environment are unsafe for humans
Which of the statements given above is/are correct?
- A 1 only
- B 3 only
- C 1 and 2
- D 2 and 3 ✓
✓ Correct answer: (D)
Science & Technology › Emerging Tech
CDS2021
The size of particles being studied in 'nano-technology' is about
- A 1 Å – 10 nm
- B 1 – 100 nm ✓
- C 1 – 50 µ
- D 1 mm – 10 mm
✓ Correct answer: (B)
Science & Technology › Emerging Tech
CSE2020
With reference to carbon nanotubes, consider the following statements
- They can be used as carriers of drugs and antigens in the human body
- They can be made into artificial blood capillaries for an injured part of human body
- They can be used in biochemical sensors
- Carbon nanotubes are biodegradable
Which of the statements given above are correct ?
- A 1 and 2 only
- B 2, 3 and 4 only
- C 1, 3 and 4 only ✓
- D 1, 2, 3 and 4
✓ Correct answer: (C)
Science & Technology › Emerging Tech
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