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Topic chemical change
Asked 2 times across 2 UPSC exams over 1 years (2022–2023), peaking in 2022.
Key insights
- Most tested in NDA — 1 of 2 PYQs
- Most asked in 2022
- Recurs across 2 years (2022–2023)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
NDA 2022 → EPFO 2023
How the concept evolved
Rising — more than half its appearances (2 of 2) are since 2016.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
EPFO2023
Which one of the following is an example of chemical change?
- A Melting of wax
- B Heating of iron
- C Dissolution of sugar in water
- D Burning of magnesium in air ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
NDA2022
Which one of the following is a chemical change?
- A Dissolving sugar in water
- B Melting of ice
- C Crystallization
- D Milk turning sour ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
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