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Topic Radioisotopes
Asked 3 times across 3 UPSC exams over 6 years (2015–2021), peaking in 2015.
Key insights
- Most tested in CAPF — 1 of 3 PYQs
- Most asked in 2015
- Recurs across 3 years (2015–2021)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CAPF 2015 → NDA 2020 → CISF 2021
How the concept evolved
Rising — more than half its appearances (2 of 3) are since 2016.
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.
CISF2021
Isotope of Cobalt is used in the treatment of
- A Cancer. ✓
- B Goitre.
- C Beriberi.
- D Crohn's disease.
✓ Correct answer: (A)
Science & Technology › Biology & Health
NDA2020
Which one of the following element's isotope is used in the treatment of cancer ?
- A Uranium
- B Cobalt
- C Sodium
- D Iodine ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CAPF2015
Match List-I with List-II and select the correct answer using the code given below the Lists
| List I (Element) | List II (Application) |
|---|
| A. Isotope of Uranium | 1. Treatment of cancer |
| B. Isotope of Cobalt | 2. Treatment of goitre |
| C. Isotope of Iodine | 3. Treatment of secondary cancer |
| D. Isotope of Radium | 4. Nuclear fuel |
Codes:
- A A-3 B-2 C-1 D-4
- B A-3 B-1 C-2 D-4
- C A-4 B-1 C-2 D-3 ✓
- D A-3 B-1 C-4 D-2
✓ Correct answer: (C)
Science & Technology › Energy & Nuclear
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