Topic Porosity
Asked 2 times across 2 UPSC exams over 30 years (1984–2014), peaking in 1984.
Key insights
- Most tested in CSE — 1 of 2 PYQs
- Most asked in 1984
- Recurs across 2 years (1984–2014)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1984 → CDS 2014
How the concept evolved
Largely a pre-2016 idea — watch for a comeback.
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.
CDS2014
Consider the following statements
Statement IClay layers are poor aquifers
Statement IIThe inter-particle space of clay minerals is the small
Select the correct answer using the code given below.
- A Both the Statements are individually true and Statement II is the correct explanation of Statement I ✓
- B Both the Statements are individually true but Statement II is not the correct explanation of Statement I
- C Statement I is true but Statement II is false
- D Statement I is false but Statement II is true
✓ Correct answer: (A)
Geography › Geomorphology
CSE1984
When a brick is dropped in water, bubbles are seen to rise. This is due to
- A Air in the pores of the brick ✓
- B Air in water
- C Water displaced by the brick
- D None of these
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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