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Topic Earth interior
Asked 2 times across 2 UPSC exams over 1 years (2024–2025), peaking in 2024.
Key insights
- Most tested in CDS — 1 of 2 PYQs
- Most asked in 2024
- Recurs across 2 years (2024–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2024 → CISF 2025
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.
CISF2025
Which of the following statements with reference to mantle is/are correct ?
- Moho's discontinuity is at the uppermost part of the mantle
- The lower portion of the mantle is called the asthenosphere. Select the answer
using the code given below :
- A 1 only ✓
- B 2 only
- C Both 1 and 2
- D Neither 1 nor 2
✓ Correct answer: (A)
Geography › Geomorphology
CDS2024
Which one of the following statements regarding S-waves is not correct ?
- A S-waves are slower than P-waves.
- B During an earthquake S-waves are less destructive to structures like buildings and highway overpasses. ✓
- C S-waves can travel only through solids and cannot travel through the Earth's outer core.
- D Seismologists have concluded that the Earth's outer core must be liquid or fluid.
✓ Correct answer: (B)
Geography › Geomorphology
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