Topic Mixtures
Asked 5 times across 4 UPSC exams over 8 years (2015–2023), peaking in 2023.
Key insights
- Most tested in CDS — 2 of 5 PYQs
- Most asked in 2023
- Recurs across 4 years (2015–2023)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
EPFO 2015 → CDS 2019 → GEO 2022 → NDA 2023
How the concept evolved
Rising — more than half its appearances (4 of 5) 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.
CDS2023
Which one among the following substances is a compound ?
- A Sugar ✓
- B Air
- C Milk
- D Tea
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
NDA2023
Which among the following is NOT true with respect to colloidal solution ?
- A Particles are uniformly distributed throughout the solution
- B Colloidal solution is homogenous in nature ✓
- C They show Tyndal effect
- D They do not settle down when kept undisturbed
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
GEO2022
Which one of the following mixtures will not have uniform composition?
- A Oil in water ✓
- B Sulphur in carbon disulphide
- C Alcohol in water
- D Sugar in water
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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