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Topic Chemical bonding
Asked 5 times across 3 UPSC exams over 4 years (2021–2025), peaking in 2024.
Key insights
- Most tested in CDS — 3 of 5 PYQs
- Most asked in 2024
- Recurs across 4 years (2021–2025)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
NDA 2021 → CDS 2022 → CISF 2024
How the concept evolved
Rising — more than half its appearances (5 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.
CDS2025
Why do plastics not degrade easily ?
- A They have strong ionic bonds.
- B They have strong covalent bonds.
- C They have strong metallic bonds.
- D They have very high melting points (> 500°C).
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
CDS2024
Which one of the following has the highest ionic character?
- A BeF3
- B SiO2
- C NCl3
- D K2S ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CISF2024
Which one among the following elements has the highest catenation property?
- A Silicon
- B Carbon ✓
- C Nitrogen
- D Oxygen
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
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