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Topic Physical and chemical change
Asked 2 times across 2 UPSC exams over 1 years (2023–2024), peaking in 2023.
Key insights
- Most tested in NDA — 1 of 2 PYQs
- Most asked in 2023
- Recurs across 2 years (2023–2024)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
NDA 2023 → CISF 2024
How the concept evolved
Rising — more than half its appearances (2 of 2) 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.
CISF2024
Which one of the following is an example of a physical change?
- A Ripening of banana
- B Souring of milk
- C Melting of ice ✓
- D Passing CO2 gas into water
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
NDA2023
Which one of the following processes involves chemical reaction ?
- A Evaporation of petrol
- B Dissolution of salt in water
- C Storing of oxygen gas under pressure in a gas cylinder
- D Burning of magnesium ribbon in air ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
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